Question

cos(pi/2 + theta) = -sin theta

Answer 1

Answer:

solved

Step-by-step explanation:

let theta = ∝

cos(pi/2 + theta) = -sin theta

cos(π2 + ∝) = -sin ∝

cos (π/2 - ∝) = -sin ∝

sin∝ = - sin∝

sin∝ = 0

∝ = 0 , ±π  , ±2π , ... = nπ  ,  nis integer