document.write( "Question 751257: Can you help me solve the equations for x, if 0is less than equal to x is less than equal to 2pi.
\n" ); document.write( "a) 8cos^2x=4 \n" ); document.write( "

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solve the equations for x, if 0is less than equal to x is less than equal to 2pi.
\n" ); document.write( "a) 8cos^2x=4
\n" ); document.write( "cos^2(x)=4/8=1/2
\n" ); document.write( "cos(x)=1/√2=√2/2
\n" ); document.write( "x=π/4, 3π/4 (in Q1 and Q2 where sin>0) \n" ); document.write( "

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