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- Aug 28th 2012, 05:06 PM #1
## Why does tan^2 y = x^2

Hello,

I continue to struggle with trig.

The question is:

Given that show that .

The answer given, most of which I follow, is:

Taking the reciprocal of both sides.

Hence, and this is the bit I don't get.

It's bound to be something I'm supposed to know, something basic, but why is

Thanks

- Aug 28th 2012, 05:34 PM #2