document.write( "Question 1109122: solving for the variable: cos(2θ+50)=sin(2θ-20)\r
\n" ); document.write( "\n" ); document.write( "I changed it cosine to sine and got
\n" ); document.write( "90-2theta+50=2theta-20
\n" ); document.write( "40-2theta=2theta-20
\n" ); document.write( "60=4theta
\n" ); document.write( "theta=15 \n" ); document.write( "

Algebra.Com's Answer #724276 by Boreal(15235) $\"\"$ $\"About$

You can put this solution on YOUR website!
Can substitute theta=15
\n" ); document.write( "cos (80) should equal sin (10)
\n" ); document.write( "It does. \n" ); document.write( "

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