Question

tan 3x = sin 45 * cos 45 +sin 30

Answer 1

we know that
sin45=1/ √2
cos45=1/√2
sin30=1/2

tan3x = 1/√2*1/√2+1/2

tan3x=1/2+1/2

tan3x=1

tan3x=tan45°

3x=45

x=15°