# Math Help - trig help

1. ## trig help

1. Prove sin(sin^2(x))/(1- cos(x))= 1
2. Solve 2 tan(x)+ (√12) = 0
3. 2cos(^2x) + cos(x)= 1 Write the general solutions.

2. 1. If the first identity is really $\frac{sin(sin^2(x))}{1-cos(x)}$ then I think that the statement is false. Take e.g. x=pi/4.
2. $tan(x) = -\frac{\sqrt{12}}{2}$*use the operator arctan [/tex]*tan^{-1} [/tex]*
3. This is a quadratic equation. Let $*cos(x) = y$*then the equation becomes $2y^2+y-1=0$.*

3. Originally Posted by vincisonfire
1. If the first identity is really $\frac{sin(sin^2(x))}{1-cos(x)}$ then I think that the statement is false. Take e.g. x=pi/4.
2. $tan(x) = -\frac{\sqrt{12}}{2}$*use the operator arctan [/tex]*tan^{-1} [/tex]*
3. This is a quadratic equation. Let $*cos(x) = y$*then the equation becomes $2y^2+y-1=0$.*
thanks for your help