Question

Упростить
$2sin44*cos16+2sin^231-1$

Answer 1

2sin44×cos16+2sin²31-1=sin(44-16)+sin(44+16)-cos(2×31)=sin28+sin60-cos62=
√3/2+sin28-cos(90-38)=√3/2+sin28-sin38=√3/2-2sin5×cos33