B
bjmcute94


Giải các phương trình
1) sin2x- - 2sinx.cosx = 3cos2x
2) sin3x +
cos3x = 2
3) -4cos2x + 2(
- 1)sinx + 4 -
= 0
4) 2sin17x + 2
tanx -6 = 0
5)
+ 2
tanx -6 = 0
6) 1 + sinx + cosx + sin2x + cos2x = 0
7) cotx - tanx = sinx + cosx
1) sin2x- - 2sinx.cosx = 3cos2x
2) sin3x +
3) -4cos2x + 2(
4) 2sin17x + 2
5)
6) 1 + sinx + cosx + sin2x + cos2x = 0
7) cotx - tanx = sinx + cosx