trigonometry problem - Verifying Identities

2008-01-15 11:21 pm

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

參考: ME

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