thienthanbang
New member
- Xu
- 0
1, \[4sin^2(\pi -x/2)-\sqrt{3}sin(\pi /2-2x)=1+2cos^2(x-3\pi /4)\]
2, tanx(tanx+2sinx+1)-6cosx=3+sinx(1+tanxtanx/3)
3, sinxtan2x+\sqrt{3}(sinx-\sqrt{3}tan2x)=3\sqrt{3}
4, 1/\sprt{2}cotx+\[\frac{sin2x}{sinx+cosx}\]=2sin(x+pi/2)
:strawberry:
2, tanx(tanx+2sinx+1)-6cosx=3+sinx(1+tanxtanx/3)
3, sinxtan2x+\sqrt{3}(sinx-\sqrt{3}tan2x)=3\sqrt{3}
4, 1/\sprt{2}cotx+\[\frac{sin2x}{sinx+cosx}\]=2sin(x+pi/2)
:strawberry: