Saved Bookmarks
| 1. |
0 SO0+ |9 S0 â= (6109-9 29509) (1) g |
|
Answer» (cotθ-cosecθ)²=cot²θ-2cotθcosecθ+cosec²θ=cos²θ/sin²θ-2(cosθ/sinθ)(1/sinθ)+1/sin²θ=cos²θ/sin²θ-2cosθ/sin²θ+1/sin²θ=(cos²θ-2cosθ+1)/sin²θ=(1-cosθ)²/(1-cos²θ)=(1-cosθ)²/(1+cosθ)(1-cosθ)=(1-cosθ)/(1+cosθ) |
|