Need help with a proof

**kyle0671** · December 1st 2012, 10:50 AM

Been trying to do this proof for a while and I can't seem to solve it:
Solve by using pythagorean identities:

sinx/1-cosx + sinx/1+cosx = 2cscx

Help much appreciated.

**Scopur** · December 1st 2012, 10:57 AM

Ill get you started

LHS:
$\sin(x) \left ( \frac{1}{1-\cos(x)} + \frac{1}{1+\cos(x)} \right)$

$\sin(x) \left [ \frac{1+\cos(x) + 1 -\cos(x)}{(1-\cos(x))(1+\cos(x))} \right]$

Don't forget the most important trig identity
$\sin(x)^2 + \cos(x)^2 = 1$

**kyle0671** · December 1st 2012, 01:30 PM

Thanks for the help. Got it solved

Thread: Need help with a proof

LinkBack

Thread Tools

Display

Need help with a proof

Re: Need help with a proof

Re: Need help with a proof

Similar Math Help Forum Discussions

delta-epsilon proof, but it's not the proof that's stumped me!

Proof theory: example of an existence proof of a proof?

Convert the following equational proof into a Hilbert Proof

Proof with algebra, and proof by induction (problems)

proof that the proof that .999_ = 1 is not a proof (version)

Search Tags