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**Natkirky****Member**- Registered: 2006-10-17
- Posts: 21

Hi,

I was wondering if someone could help with this question:

Show: 1 - cosθ/sinθ = sinθ/1 + cosθ

I can get all other variations of this to work and i can only get this to work the wrong way around ie 1 + cosθ/sinθ, so I know it's something really stupid I am missing.

I would be grateful for any help or tips

Thanks Natkirky

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**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

Here's an intermediate step:

Why did the vector cross the road?

It wanted to be normal.

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**Natkirky****Member**- Registered: 2006-10-17
- Posts: 21

Hi Mathsyperson,

Thanks for the step got that to work out now. I always use the denominator to multiply by did not even think to use this.

Thanks again

Natkirky

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**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606

Hi Natkirky;

Or:

This is a proportion so you can cross multiply:

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

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