Giải phương trình lượng giác sau
Giải phương trình lượng giác sau:
a) cos(4x+ π/3) +cos(π/4 -3x)=0
b) cos(4x- 3π/5) + cos(3π/2 -6)=0
c) sin(3x- 2π/3) + sin( π/6 - 4x)=0
d) sin(7x+ 3π/4) - cos(5x+ π/6)=0
e)tan(6x - 5π/6) + cot(4x+ π/3)=0
f)tan(4x+ 9π/8) + cot(2x- 3π/4)=0
a) cos(4x+ π/3) +cos(π/4 -3x)=0
b) cos(4x- 3π/5) + cos(3π/2 -6)=0
c) sin(3x- 2π/3) + sin( π/6 - 4x)=0
d) sin(7x+ 3π/4) - cos(5x+ π/6)=0
e)tan(6x - 5π/6) + cot(4x+ π/3)=0
f)tan(4x+ 9π/8) + cot(2x- 3π/4)=0