Posted by **Valerie** on Saturday, May 5, 2012 at 2:09am.

Can anyone please explain these problems to me?? I really need help!I need to simplify these trig expressions but I don't understand how my teacher is doing it at all and I have a quiz on this tomorrow! I've really been trying but I just don't get it!

1)Mulitply:

[cosx/(1-cosx)][1+sinx/(1+sinx)]

2)Rewrite over common denominator:

[1/(1-cosx)]+[1/(1+cosx)]

3)Establish the identity:

[(1-cot^2x)/(1+cot^2x)]+1=2sin^2x

## Answer this Question

## Related Questions

- Science - I REALLY REALLY NEED HELP SO 1.I need to do an essay asking you (me)to...
- trig - I'm confused with this concept: Okay, so I have this problem: cos2x( 2 ...
- algebra - can someone please explain "converting to slope-intercept form" to me ...
- AlgebraII - I really stuck on binomial theorem and I have a whole worksheet due ...
- Algebra 2 - Can someone check my work please? I tried my best on all the ...
- Math - I need some help please. I dont understand the math that we are doing. ...
- Algebra-I really need help, please? - I have to solve sqrt(2x-7) >=5 answers ...
- Algebra 1 - I need some help please. I dont understand the math that we are ...
- Social Studies - PLEASE EXPLAIN IN YOUR OWN WORDS PLEASE PLEASE HELP IN YOUR OWN...
- principles of economics - Explain how Demand, Elasticity, and Total Revenue are ...

More Related Questions