7sin^2 theta -22 sin theta +3 =0

7sin^theta - 21sin theta -sin theta + 3

7sin theta(sin theta-1)- 1( sin theta-1) =0

(7sin theta-1) (sin theta-1)=0

sin theta= 1 or 1/7

any doubt let me know

I need the answer(s) in __+2*K*pi

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