document.write( "Question 889517: 7 cos sigma +8 sqroot 2=5 cos sigma+7sqroot 2 \n" ); document.write( "
Algebra.Com's Answer #538212 by lwsshak3(11628)\"\" \"About 
You can put this solution on YOUR website!
7 cos sigma +8 sqroot 2=5 cos sigma+7sqroot 2
\n" ); document.write( "***
\n" ); document.write( "use x for sigma
\n" ); document.write( "for interval [0,2π)
\n" ); document.write( "solve for x
\n" ); document.write( "7cosx+8√2=5cosx+7√2
\n" ); document.write( "2cosx=-√2
\n" ); document.write( "cosx=-√2/2
\n" ); document.write( "x=5π/4, 7π/4
\n" ); document.write( " \n" ); document.write( "
\n" );