{"id":21266,"date":"2021-12-17T16:20:26","date_gmt":"2021-12-17T09:20:26","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=21266"},"modified":"2021-12-17T16:20:28","modified_gmt":"2021-12-17T09:20:28","slug":"phuong-trinh-luong-giac-co-ban-va-phuong-trinh-bac-nhat-voi-mot-ham-so-luong-giac","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/phuong-trinh-luong-giac-co-ban-va-phuong-trinh-bac-nhat-voi-mot-ham-so-luong-giac\/","title":{"rendered":"PH\u01af\u01a0NG TR\u00ccNH L\u01af\u1ee2NG GI\u00c1C C\u01a0 B\u1ea2N V\u00c0 PH\u01af\u01a0NG TR\u00ccNH B\u1eacC NH\u1ea4T V\u1edaI M\u1ed8T H\u00c0M S\u1ed0 L\u01af\u1ee2NG GI\u00c1C"},"content":{"rendered":"\n<p><\/p>\n\n\n<p><strong>1. Ph\u01b0\u01a1ng tr\u00ecnh sin<em>x<\/em> = sina<\/strong><\/p>\n<p>a) <img decoding=\"async\" width=\"365\" height=\"58\" class=\"wp-image-21267\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256-20.png\" alt=\"IMG_256\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_256-20.png 365w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_256-20-300x48.png 300w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><\/p>\n<p>b) <img decoding=\"async\" width=\"380\" height=\"77\" class=\"wp-image-21268\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257-19.png\" alt=\"IMG_257\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_257-19.png 380w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_257-19-300x61.png 300w\" sizes=\"(max-width: 380px) 100vw, 380px\" \/><\/p>\n<p>c) <img decoding=\"async\" width=\"274\" height=\"26\" class=\"wp-image-21269\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258-20.png\" alt=\"IMG_258\" \/><\/p>\n<p>d) <img loading=\"lazy\" decoding=\"async\" width=\"295\" height=\"56\" class=\"wp-image-21270\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259-18.png\" alt=\"IMG_259\" \/><\/p>\n<p>e) <img loading=\"lazy\" decoding=\"async\" width=\"309\" height=\"56\" class=\"wp-image-21271\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260-20.png\" alt=\"IMG_260\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_260-20.png 309w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_260-20-300x54.png 300w\" sizes=\"(max-width: 309px) 100vw, 309px\" \/><\/p>\n<p>\u00a0<\/p>\n<p><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"26\" class=\"wp-image-21272\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261-17.png\" alt=\"IMG_261\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"294\" height=\"52\" class=\"wp-image-21273\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262-18.png\" alt=\"IMG_262\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"319\" height=\"52\" class=\"wp-image-21274\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263-19.png\" alt=\"IMG_263\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_263-19.png 319w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_263-19-300x49.png 300w\" sizes=\"(max-width: 319px) 100vw, 319px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"617\" height=\"52\" class=\"wp-image-21275\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264-18.png\" alt=\"IMG_264\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_264-18.png 617w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_264-18-300x25.png 300w\" sizes=\"(max-width: 617px) 100vw, 617px\" \/><\/p>\n<p>\u00a0<\/p>\n<p><strong>2. Ph\u01b0\u01a1ng tr\u00ecnh cos<em>x<\/em> = cosa<\/strong><\/p>\n<p>a) <img loading=\"lazy\" decoding=\"async\" width=\"335\" height=\"26\" class=\"wp-image-21276\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265-18.png\" alt=\"IMG_265\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_265-18.png 335w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_265-18-300x23.png 300w\" sizes=\"(max-width: 335px) 100vw, 335px\" \/><\/p>\n<p>b) <img loading=\"lazy\" decoding=\"async\" width=\"358\" height=\"50\" class=\"wp-image-21277\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266-18.png\" alt=\"IMG_266\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_266-18.png 358w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_266-18-300x42.png 300w\" sizes=\"(max-width: 358px) 100vw, 358px\" \/><\/p>\n<p>c) <img loading=\"lazy\" decoding=\"async\" width=\"302\" height=\"26\" class=\"wp-image-21278\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267-19.png\" alt=\"IMG_267\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_267-19.png 302w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_267-19-300x26.png 300w\" sizes=\"(max-width: 302px) 100vw, 302px\" \/><\/p>\n<p>d) <img loading=\"lazy\" decoding=\"async\" width=\"302\" height=\"56\" class=\"wp-image-21279\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268-19.png\" alt=\"IMG_268\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_268-19.png 302w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_268-19-300x56.png 300w\" sizes=\"(max-width: 302px) 100vw, 302px\" \/><\/p>\n<p>e) <img loading=\"lazy\" decoding=\"async\" width=\"307\" height=\"56\" class=\"wp-image-21280\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269-19.png\" alt=\"IMG_269\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_269-19.png 307w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_269-19-300x55.png 300w\" sizes=\"(max-width: 307px) 100vw, 307px\" \/><\/p>\n<p><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"282\" height=\"52\" class=\"wp-image-21281\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270-17.png\" alt=\"IMG_270\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"257\" height=\"26\" class=\"wp-image-21282\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271-19.png\" alt=\"IMG_271\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"303\" height=\"26\" class=\"wp-image-21283\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272-19.png\" alt=\"IMG_272\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_272-19.png 303w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_272-19-300x26.png 300w\" sizes=\"(max-width: 303px) 100vw, 303px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"580\" height=\"31\" class=\"wp-image-21284\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273-17.png\" alt=\"IMG_273\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_273-17.png 580w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_273-17-300x16.png 300w\" sizes=\"(max-width: 580px) 100vw, 580px\" \/><\/p>\n<p>\u00a0<\/p>\n<p><strong>3. Ph\u01b0\u01a1ng tr\u00ecnh tan<em>x<\/em> = tana<\/strong><\/p>\n<p>a) <img loading=\"lazy\" decoding=\"async\" width=\"303\" height=\"26\" class=\"wp-image-21285\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274-19.png\" alt=\"IMG_274\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_274-19.png 303w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_274-19-300x26.png 300w\" sizes=\"(max-width: 303px) 100vw, 303px\" \/><\/p>\n<p>b) <img loading=\"lazy\" decoding=\"async\" width=\"323\" height=\"26\" class=\"wp-image-21286\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275-18.png\" alt=\"IMG_275\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_275-18.png 323w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_275-18-300x24.png 300w\" sizes=\"(max-width: 323px) 100vw, 323px\" \/><\/p>\n<p>c) <img loading=\"lazy\" decoding=\"async\" width=\"277\" height=\"26\" class=\"wp-image-21287\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276-19.png\" alt=\"IMG_276\" \/><\/p>\n<p>d) <img loading=\"lazy\" decoding=\"async\" width=\"299\" height=\"56\" class=\"wp-image-21288\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277-19.png\" alt=\"IMG_277\" \/><\/p>\n<p>e) <img loading=\"lazy\" decoding=\"async\" width=\"306\" height=\"56\" class=\"wp-image-21289\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278-19.png\" alt=\"IMG_278\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_278-19.png 306w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_278-19-300x55.png 300w\" sizes=\"(max-width: 306px) 100vw, 306px\" \/><\/p>\n<p><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"247\" height=\"26\" class=\"wp-image-21290\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279-17.png\" alt=\"IMG_279\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"313\" height=\"52\" class=\"wp-image-21291\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280-19.png\" alt=\"IMG_280\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_280-19.png 313w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_280-19-300x50.png 300w\" sizes=\"(max-width: 313px) 100vw, 313px\" \/><\/p>\n<p>\u00a0<\/p>\n<p><strong>4. Ph\u01b0\u01a1ng tr\u00ecnh cot<em>x<\/em> = cota<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"302\" height=\"26\" class=\"wp-image-21292\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281-18.png\" alt=\"IMG_281\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_281-18.png 302w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_281-18-300x26.png 300w\" sizes=\"(max-width: 302px) 100vw, 302px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"328\" height=\"26\" class=\"wp-image-21293\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282-19.png\" alt=\"IMG_282\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_282-19.png 328w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_282-19-300x24.png 300w\" sizes=\"(max-width: 328px) 100vw, 328px\" \/><\/p>\n<p><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"282\" height=\"52\" class=\"wp-image-21294\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283-18.png\" alt=\"IMG_283\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"307\" height=\"52\" class=\"wp-image-21295\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284-18.png\" alt=\"IMG_284\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_284-18.png 307w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_284-18-300x51.png 300w\" sizes=\"(max-width: 307px) 100vw, 307px\" \/><\/p>\n<p><strong>5. Ph\u01b0\u01a1ng tr\u00ecnh b\u1eadc nh\u1ea5t \u0111\u1ed1i v\u1edbi m\u1ed9t h\u00e0m s\u1ed1 l\u01b0\u1ee3ng gi\u00e1c<\/strong><\/p>\n<p>C\u00f3 d\u1ea1ng <img loading=\"lazy\" decoding=\"async\" width=\"80\" height=\"25\" class=\"wp-image-21296\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285-19.png\" alt=\"IMG_285\" \/> v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"123\" height=\"26\" class=\"wp-image-21297\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286-18.png\" alt=\"IMG_286\" \/><strong> v\u1edbi <\/strong> <img loading=\"lazy\" decoding=\"async\" width=\"10\" height=\"20\" class=\"wp-image-21298\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287-19.png\" alt=\"IMG_287\" \/> l\u00e0 m\u1ed9t h\u00e0m s\u1ed1 l\u01b0\u1ee3ng gi\u00e1c n\u00e0o \u0111\u00f3<\/p>\n<p>C\u00e1ch gi\u1ea3i: <img loading=\"lazy\" decoding=\"async\" width=\"165\" height=\"53\" class=\"wp-image-21299\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288-19.png\" alt=\"IMG_288\" \/> \u0111\u01b0a v\u1ec1 ph\u01b0\u01a1ng tr\u00ecnh l\u01b0\u1ee3ng gi\u00e1c c\u01a1 b\u1ea3n<\/p>\n<p><strong>6. M\u1ed9t s\u1ed1 \u0111i\u1ec1u c\u1ea7n ch\u00fa \u00fd:<\/strong><\/p>\n<p>a) Khi gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 ch\u1ee9a c\u00e1c h\u00e0m s\u1ed1 tang, cotang, c\u00f3 m\u1eabu s\u1ed1 ho\u1eb7c ch\u1ee9a c\u0103n b\u1eadc ch\u1eb5n, th\u00ec nh\u1ea5t thi\u1ebft ph\u1ea3i \u0111\u1eb7t \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 ph\u01b0\u01a1ng tr\u00ecnh x\u00e1c \u0111\u1ecbnh.<\/p>\n<p>* Ph\u01b0\u01a1ng tr\u00ecnh ch\u1ee9a tan<em>x<\/em> th\u00ec \u0111i\u1ec1u ki\u1ec7n: <img loading=\"lazy\" decoding=\"async\" width=\"168\" height=\"52\" class=\"wp-image-21300\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289-20.png\" alt=\"IMG_289\" \/><\/p>\n<p>* Ph\u01b0\u01a1ng tr\u00ecnh ch\u1ee9a cot<em>x<\/em> th\u00ec \u0111i\u1ec1u ki\u1ec7n: <img loading=\"lazy\" decoding=\"async\" width=\"129\" height=\"26\" class=\"wp-image-21301\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_290-19.png\" alt=\"IMG_290\" \/><\/p>\n<p>* Ph\u01b0\u01a1ng tr\u00ecnh ch\u1ee9a c\u1ea3 tan<em>x<\/em> v\u00e0 cot<em>x<\/em> th\u00ec \u0111i\u1ec1u ki\u1ec7n <img loading=\"lazy\" decoding=\"async\" width=\"139\" height=\"52\" class=\"wp-image-21302\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_291-19.png\" alt=\"IMG_291\" \/><\/p>\n<p>* Ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 m\u1eabu s\u1ed1:<\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"246\" height=\"26\" class=\"wp-image-21303\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_292-19.png\" alt=\"IMG_292\" \/><\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"281\" height=\"52\" class=\"wp-image-21304\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_293-19.png\" alt=\"IMG_293\" \/><\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"260\" height=\"52\" class=\"wp-image-21305\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_294-19.png\" alt=\"IMG_294\" \/><\/p>\n<p>\u00b7 <img loading=\"lazy\" decoding=\"async\" width=\"254\" height=\"52\" class=\"wp-image-21306\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_295-18.png\" alt=\"IMG_295\" \/><\/p>\n<p>b) Khi t\u00ecm \u0111\u01b0\u1ee3c nghi\u1ec7m ph\u1ea3i ki\u1ec3m tra \u0111i\u1ec1u ki\u1ec7n. Ta th\u01b0\u1eddng d\u00f9ng m\u1ed9t trong c\u00e1c c\u00e1ch sau \u0111\u1ec3 ki\u1ec3m tra \u0111i\u1ec1u ki\u1ec7n:<\/p>\n<p>1. Ki\u1ec3m tra tr\u1ef1c ti\u1ebfp b\u1eb1ng c\u00e1ch thay gi\u00e1 tr\u1ecb c\u1ee7a <em>x<\/em> v\u00e0o bi\u1ec3u th\u1ee9c \u0111i\u1ec1u ki\u1ec7n.<\/p>\n<p>2. D\u00f9ng \u0111\u01b0\u1eddng tr\u00f2n l\u01b0\u1ee3ng gi\u00e1c \u0111\u1ec3 bi\u1ec3u di\u1ec5n nghi\u1ec7m<\/p>\n<p>3. Gi\u1ea3i c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh v\u00f4 \u0111\u1ecbnh.<\/p>\n<p>c) S\u1eed d\u1ee5ng MTCT \u0111\u1ec3 th\u1eed l\u1ea1i c\u00e1c \u0111\u00e1p \u00e1n tr\u1eafc nghi\u1ec7m<\/p>","protected":false},"excerpt":{"rendered":"<p>1. Ph\u01b0\u01a1ng tr\u00ecnh sinx = sina a) b) c) d) e) \u00a0 C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t: \u00a0 2. Ph\u01b0\u01a1ng tr\u00ecnh cosx = cosa a) b) c) d) e) C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t: \u00a0 3. Ph\u01b0\u01a1ng tr\u00ecnh tanx = tana a) b) c) d) e) C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t: \u00a0 4. Ph\u01b0\u01a1ng tr\u00ecnh [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[42],"tags":[],"class_list":["post-21266","post","type-post","status-publish","format-standard","hentry","category-toan-lop-11"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/21266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=21266"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/21266\/revisions"}],"predecessor-version":[{"id":21307,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/21266\/revisions\/21307"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=21266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=21266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=21266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}