Question

Упростите выражение sin4a/4cos2a

Answer 1

$= frac{2 sin(2 alpha ) cos(2 alpha ) }{4 cos(2 alpha ) } = frac{1}{2} times sin(2 alpha )$

Answer 2

$frac{Sin4alpha}{4Cos2alpha} =frac{2Sin2alpha Cos2alpha}{4Cos2alpha}=frac{Sin2alpha}{2} =0,5 Sin2alpha$