Question

как решить
sin^2(33°)+sin^2(33°)-cos^2(60°)​

Answer 1

$sin^2(33а)+sin^2(33а)-cos^2(60а)=sin^2(33а)+cos^2(57а)-cos^2(60а)=\=1-frac{1}{4} =frac{3}{4} =0,75$