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tan/cos/sin150度等于多少，怎么算

学习时间:2026-09-29 12:57:32 阅读：5761

tan/cos/sin150度等于多少，怎么算

最佳回答

害怕的白羊

雪白的砖头

2026-09-29 12:57:32

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tan150°

=tan(180°-30°)

=-tan30°

=-sin30°/cos30°

=(-1/2)/(√3/2)

=-1/2*2/√3

=-1/√3

=-√3/3

cos150°

=cos(180°-30°)

=-cos30°

=-√3/2

sin150°

=sin(180°-30°)

=sin30°

=1/2

最新回答共有2条回答

雪白的蚂蚁
回复
2026-09-29 12:57:32
tan150°
=tan(180°-30°)
=-tan30°
=-sin30°/cos30°
=(-1/2)/(√3/2)
=-1/2*2/√3
=-1/√3
=-√3/3

cos150°
=cos(180°-30°)
=-cos30°
=-√3/2

sin150°
=sin(180°-30°)
=sin30°
=1/2

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