Prove that(3)

用戶114652

2007-04-01 8:41 am

sin^2(90度-X)=1-sin^2X

回答 (2)

bfaifaiwong

2007-04-01 8:47 am

✔ 最佳答案

L.H.S.= sin²(90° - X)
= cos²X
= 1 - sin²X
= R.H.S.

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carmen

2007-04-01 8:50 am

sin²(90º-x)
=[sin(90º-1)]²
=(cosx)²
=cos²x
=1-sin²x

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收錄日期: 2021-04-12 20:15:54
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