trigonometry problem

2008-01-15 11:18 pm
Verifying Identities

sinθ cos^2θ - cos^3θ + sin^2θ cosθ - sin^3θ = sinθ + cosθ
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2 sinθ cosθ - 1

令左邊既分數等於 sinθ + cosθ

回答 (1)

2008-01-15 11:43 pm
✔ 最佳答案
As follows~

圖片參考:http://i204.photobucket.com/albums/bb125/jasonchan424/410.jpg
參考: ME


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