Posted by **Rani** on Tuesday, December 2, 2008 at 9:02pm.

Prove each idenity.

1+1/tan^2x=1/sin^2x

1/cosx-cosx=sinxtanx

1/sin^2x+1/cos^2x=1/sin^2xcos^2x

1/1-cos^2x+/1+cosx=2/sin^2x

and

(1-cos^2x)(1+1/tan^2x)= 1

I haven't even gotten 'round to sny of the quedtions because the first one is just so hard. I'm not really sure I'm uderstanding how to use the quotient and pythagorean identities. I'm so confused. I can't make sense of it and I have tried so many different ways. I must have spent over an hour on he first problem and still I can't come up with an answer. I'm just really frustrated; could someone please help me. I'd really appreciate it.

## Answer This Question

## Related Questions

- Math - help really needed - I'm sorry to double post; I don't want to seem ...
- Trigonometry - Prove the following trigonometric identities. please give a ...
- Trig....... - I need to prove that the following is true. Thanks (2tanx /1-tan^x...
- Trig Identities - Proving identities: 1) 1+ 1/tan^2x = 1/sin^2x 2) 2sin^2 x-1 = ...
- Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
- Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...
- Precalculus/Trig - I can't seem to prove these trig identities and would really ...
- Math (trigonometric identities) - I was given 21 questions for homework and I ...
- precalculus - For each of the following determine whether or not it is an ...
- Trigonometry. - ( tanx/1-cotx )+ (cotx/1-tanx)= (1+secxcscx) Good one! ...

More Related Questions