# Thread: Urgent Help With Trig Proofs

1. ## Urgent Help With Trig Proofs

(Sinθ - 1)/(1-sin2θ) = (cscθ)/(-cscθ-1)

or

(1-sinθ)/(1+sinθ) = (tanθ-secθ)^2

2. 1) Please write what you mean. You have written $\displaystyle \sin(2\theta)$. I am guessing this is not your intent.

2) Are you acquainted with the Pythagorean Identity? $\displaystyle \cos^{2}(x) + \sin^{2}(x) = 1$?

3) $\displaystyle \csc(\theta) = 1/\sin(\theta)$

3. i intended it to read sin^2 theta

4. Originally Posted by rabidsquirrel
(Sinθ - 1)/(1-sin2θ) = (cscθ)/(-cscθ-1)
$\displaystyle \frac{\csc x}{-\csc x - 1} = - \frac{1}{1+\sin x}$

you should know what to multiply then...

5. Originally Posted by kalagota
$\displaystyle \frac{\csc x}{-\csc x - 1} = - \frac{1}{1+\sin x}$

you should know what to multiply then...
you cannot multiply across, it is a proof

6. Originally Posted by kalagota
$\displaystyle \frac{\csc x}{-\csc x - 1} = - \frac{1}{1+\sin x}$

you should know what to multiply then...

7. Originally Posted by rabidsquirrel