SOLUTION: 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

Algebra ->  Trigonometry-basics -> SOLUTION: 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      Log On


   

Question 1109122: 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
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Can substitute theta=15
cos (80) should equal sin (10)
It does.