document.write( "Question 645729: Evaluate the expression without using a calculator
\n" ); document.write( "(sin pi/6 cos pi/4 - sin pi/4 cos pi/6)2 \n" ); document.write( "

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Evaluate the expression without using a calculator
\n" ); document.write( "(sin pi/6 cos pi/4 - sin pi/4 cos pi/6)^2
\n" ); document.write( "=(1/2*√2/2-√2/2*√3/2)^2
\n" ); document.write( "=(√2/4-√6/4)^2
\n" ); document.write( "=2/16-2√12/16+6/16
\n" ); document.write( "=1/8-√12/8+3/8
\n" ); document.write( "=4/8-√12/8
\n" ); document.write( "=(4-√12)/8 \n" ); document.write( "

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