Prove that
a)
sinθsin(90-θ)//tan(90-θ )- cos(180-θ)sin(90-θ)= 1
b)1+2sinθ cosθ/1- 2sin^2θ =) cosθ+sinθ / cosθ-sinθ
(
(
Basic Trigonometry
2012-09-20 1:23 am
回答 (1)
2012-09-20 2:09 am
✔ 最佳答案
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http://i1096.photobucket.com/albums/g340/pingshek/2012-9-19_zps214736f3.png?t=1348049050
參考: miraco
收錄日期: 2021-04-30 16:50:37
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