Question

PLEASE HELP QUICKLY WILL FAN AND MEDAL
7-sin(theta)=cos(2theta)
What is the solution in the interval
2 pi≤θ<2π​?

Answer 1

@Cuanchi @Loser66

Answer 2

You have to use \(sin^2t =\dfrac{1-cos 2t}{2}\)
to change cos (2t) to sin^2 t, then solve quadratic equation for sin (t) , then solve for t