有關Form. 2"三角比的關係"嘅問題...

請大家幫吓我解答以下嘅問題, 唔該~~Thank you very much!
1. [sin(90°-Θ)sinΘ / sinΘ-1]+[cos(90°-Θ)cosΘ / sinΘ+1] ≡ [-2sinΘ / tan(90°-Θ)]
("/"是代表over)

2.[cosΘtanΘ + cos(90°-Θ)tan(90°-Θ)] ^2 - 2sinΘsin(90°-Θ) ≡ 1

唔明嘅話可以去以下網址:
(question 1)http://us.f6.yahoofs.com/hkblog/V3A7A7yGGBglkS_Wky_llrv4gxo_Tw--_2/blog/20100524095441255.jpg?ib_____Dejoa3c9K

(question 2)http://us.f6.yahoofs.com/hkblog/V3A7A7yGGBglkS_Wky_llrv4gxo_Tw--_2/blog/20100524095433204.jpg?TTASG_LBk1OmsU.3

唔該晒呀!!因為我6月9號要exam啦~~唔該吖~~^^