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a maths!!
發問:
1. prove the identity ( cos^2Θ-sinΘcosΘ+tanΘ)/(cos^2Θ+sinΘcosΘ-tanΘ)=(1+tan^3Θ)/1-tan^3Θ)2.if cosΘ and cosecΘ are the roots of the equation 3x^2+hx-1=0 , where π/2
最佳解答:
As follows~ 圖片參考:http://i204.photobucket.com/albums/bb125/jasonchan424/308.jpg 2008-02-17 19:56:25 補充: Θ=5pi/6
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