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**akspar****Guest**

I have had trouble solving this problem.

Beginning with the trigonmetic identity

cos^2(phi)+ sin^2(phi) = 1

show that the trigonmetric identity

cot(phi) + csc(phi) = sin(phi)/ 1 - cos(phi) holds

any help would be much appreciated.

**Stanley_Marsh****Member**- Registered: 2006-12-13
- Posts: 345

sin(phi)/ 1 or 1/sin(phi) ?

Numbers are the essence of the Universe

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**akspar****Guest**

Here is a better illustration of it.

**JaneFairfax****Member**- Registered: 2007-02-23
- Posts: 6,868

Well, youre told to begin with the trig identity, so start there.

Now divide by sin(φ)(1−cos(φ)) and youll get the answer.

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**akspar****Guest**

Thanks so much, can't believe i didn't c that.

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