Решите неравенство: 2cos(2x-3)=-2sin(2x-3)

Question

Решите неравенство:
2cos(2x-3)=-2sin(2x-3)

Answer 1

 =2cos(2x-3)\cos(2x-3)  =  -2sin(2x-3)\cos(2x-3)
2= -  2sin(2x-3)\cos(2x-3)
2=2tg(3-2x)
2tg(3-2x)=2
tg(3-2x)=1
3-2x= pi\4 +piK
x= -  pi+4piK-12\8