Question

$\sin(3a) =$
$\cos(3a = )$
$tan3 a =$

​

Answer 1

$1) \: \: \sin(3 \alpha ) = \: 3 \sin( \alpha ) - 4 \sin {}^{3} ( \alpha ) \\ \\ \\ \\ 2) \: \: \: \: \cos(3 \alpha ) = 4 \cos {}^{3} ( \alpha ) - 3 \cos( \alpha ) \\ \\ \\ \\ \\ 3) \tan(3 \alpha ) = 3 \tan( \alpha ) - 4 \tan {}^{3} ( \alpha ) \div (1 - 3 \tan {}^{2} ( \alpha )$

Answer 2

mark me the brainliest