You can put this solution on YOUR website! csc(t+40)=sec(t-20)
1/sin(t+40)=1/cos(t-20)
sin(t+40)=cos(t-20)
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Similar to the one you solved earlier.
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solving for the variable: cos(2θ+50)=sin(2θ-20)
I changed it cosine to sine and got
90-2theta+50=2theta-20
40-2theta=2theta-20
60=4theta
theta=15
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Probably you, maybe someone else.