Question

cot^2 theta-1/sin^2theta=1

Answer 1

Answer:

Answer

Step-by-step explanation:

It is given that, sinθ+2cosθ=1, we have to prove that,2sinθ−cosθ=2. Since, both the values of cosθ,sinθ lies between -1 to 1. The addition of these trigonometric functions cannot be negative. Hence we consider only the positive value.