Question

Find the value of theta................
4cos(square)theta-1=0

Answer 1

Hey MaTe!!!

4cos^2 Φ - 1= 0

cos^2 Φ = 1/4

cos Φ = √(1/4)

cos Φ = ±1/2

Φ => π/3 , 4π /3. Answer

Hope it helps :))