1. (sinx/1+sinx) - (sinx/1-sinx)

2. tanx(cotx-cosx) = ?

3. cos4x

4. (tanx+1)(2sinx-sqrt3) = 0

5. sin2x + sinx = 0

6. sin^2(2)x=1

If yall could help me that would be great, i really just kinda suck at all of this, im more of a visual learner if you get what im saying.