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sin(50-3/2theta)=cos (3theta-50)
sin(50-3/2theta)=sin(90-3theta+50)
sin(50-3/2theta)=sin(140-3theta)
(50-3/2theta)=140-3theta
140-50=3theta-3/2theta
90=3theta/2
therefore thetha=60
hope this helps
sin(50-3/2theta)=sin(90-3theta+50)
sin(50-3/2theta)=sin(140-3theta)
(50-3/2theta)=140-3theta
140-50=3theta-3/2theta
90=3theta/2
therefore thetha=60
hope this helps
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