特殊角度的三角函数值
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发布时间:2022-04-23 13:07
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热心网友
时间:2023-10-14 20:48
常见的特殊角度的常用三角函数值如下:
① sin0°=sin180°=sin360°
=cos90°=cos270°=0,
② sin90°=cos0°=cos360°=1,
③ sin270°=cos180°=-1,
④ tan0°=tan180°=tan360°=0,
⑤ sin30°=sin150°
=cos60°=cos300°=1/2,
⑥ sin45°=sin135°
=cos45°=cos315°=√2/2,
⑦ sin60°=sin120°
=cos30°=cos330°=√3/2,
⑧ sin210°=sin330°
=cos120°=cos240°=-1/2,
⑨ sin225°=sin315°
=cos135°=cos225°=-√2/2,
⑩ sin240°=sin300°
=cos150°=cos210°=-√3/2,
(11) tan30°=tan210°=√3/3,
(12) tan45°=tan225°=1,
(13) tan60°=tan240°=√3,
(14) tan150°=tan330°=-√3/3,
(15) tan135°=tan315°=-1,
(16) tan120°=tan300°=-√3,
(17) sin15°=cos75°=(√6-√2)/4,
(18) sin18°=cos72°=(√5-1)/4,
(19) sin22.5°=cos67.5°=√(2-√2)/2,
(20) sin36°=cos54°=√(10-2√5)/4,
(21) sin54°=cos36°=(√5+1)/4,
(22) sin67.5°=cos22.5°=√(2+√2)/2,
(23) sin72°=cos18°=√(10+2√5)/4,
(24) sin75°=cos15°=(√6+√2)/4,
(25) tan15°=2-√3,
(26) tan18°=√[(5-2√5)/5],
(27) tan22.5°=√2-1,
(28) tan36°=√(5-2√5),
(29) tan54°=√[(5+2√5)/5],
(30) tan67.5°=√2+1,
(31) tan72°=√(5+2√5),
(32) tan75°=2+√3.
热心网友
时间:2023-10-14 20:48
常见的特殊角度的常用三角函数值如下:
① sin0°=sin180°=sin360°
=cos90°=cos270°=0,
② sin90°=cos0°=cos360°=1,
③ sin270°=cos180°=-1,
④ tan0°=tan180°=tan360°=0,
⑤ sin30°=sin150°
=cos60°=cos300°=1/2,
⑥ sin45°=sin135°
=cos45°=cos315°=√2/2,
⑦ sin60°=sin120°
=cos30°=cos330°=√3/2,
⑧ sin210°=sin330°
=cos120°=cos240°=-1/2,
⑨ sin225°=sin315°
=cos135°=cos225°=-√2/2,
⑩ sin240°=sin300°
=cos150°=cos210°=-√3/2,
(11) tan30°=tan210°=√3/3,
(12) tan45°=tan225°=1,
(13) tan60°=tan240°=√3,
(14) tan150°=tan330°=-√3/3,
(15) tan135°=tan315°=-1,
(16) tan120°=tan300°=-√3,
(17) sin15°=cos75°=(√6-√2)/4,
(18) sin18°=cos72°=(√5-1)/4,
(19) sin22.5°=cos67.5°=√(2-√2)/2,
(20) sin36°=cos54°=√(10-2√5)/4,
(21) sin54°=cos36°=(√5+1)/4,
(22) sin67.5°=cos22.5°=√(2+√2)/2,
(23) sin72°=cos18°=√(10+2√5)/4,
(24) sin75°=cos15°=(√6+√2)/4,
(25) tan15°=2-√3,
(26) tan18°=√[(5-2√5)/5],
(27) tan22.5°=√2-1,
(28) tan36°=√(5-2√5),
(29) tan54°=√[(5+2√5)/5],
(30) tan67.5°=√2+1,
(31) tan72°=√(5+2√5),
(32) tan75°=2+√3.