document.write( "Question 1116098: Solve cos(4theta)=0 \n" ); document.write( "
Algebra.Com's Answer #730929 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Solve cos(4theta)=0
\n" ); document.write( "----
\n" ); document.write( "4t = arccos(0) = pi/2
\n" ); document.write( "---
\n" ); document.write( "theta = pi/8
\n" ); document.write( "------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "-----------
\n" ); document.write( "
\n" );