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

$\frac{Sin4\alpha}{4Cos2\alpha} =\frac{2Sin2\alpha Cos2\alpha}{4Cos2\alpha}=\frac{Sin2\alpha}{2} =0,5 Sin2\alpha$