match the follow items.
1. sinθ/cosθ
2.sin^2θ+cos^2θ
3.sin(90degree -θ)
4.cos(90degree -θ)
5.tan(90degree -θ)
A.cosθ
B.sinθ
C.tanθ
D.1
E.1/tanθ
1.___ 2.___ 3.___ 4.___ 5.___
trigonometry (sin,cos,tan)
2008-07-25 4:49 am
回答 (1)
2008-07-25 5:58 am
✔ 最佳答案
1. sinθ/cosθ=tanθ
2.sin2θ+cos2θ
=1
3.sin(90degree -θ)
=cosθ
4.cos(90degree -θ)
=sinθ
5.tan(90degree -θ)
=1/tanθ
收錄日期: 2021-04-23 20:34:08
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