document.write( "Question 816603: Solve for B; cos(3B - pi/4) =1/2 \n" ); document.write( "

Algebra.Com's Answer #491637 by lwsshak3(11628) $\"\"$ $\"About$

You can put this solution on YOUR website!
Solve for B; cos(3B - pi/4) =1/2
\n" ); document.write( "assume(3B-π/4) is an acute angle
\n" ); document.write( "cos(3B-π/4)=1/2=cos(π/3)
\n" ); document.write( "3B-π/4=π/3
\n" ); document.write( "3B=π/3+π/4=4π/12+3π/12=7π/12
\n" ); document.write( "3B=7π/12
\n" ); document.write( "B=7π/36 \n" ); document.write( "

\n" );