Question

Find theta if 2 sin^2 theta - 5 sin theta +2 =0

Answer 1

Answer:

sin 30

Step-by-step explanation:

Let sin theta=x

2x^2-5x+2=0

2x^2-4x-x+2=0

2x(x-2)-1(x-2)=0

(2x-1) (x-2) =0

x=1/2 x=2

sintheta=x

put the value of x=1/2

sintheta=1/2

theta=30

sint theta=30