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September 19, 2014

September 19, 2014

Posted by **Lisa** on Tuesday, February 19, 2013 at 2:52am.

- Pre Cal -
**Reiny**, Tuesday, February 19, 2013 at 9:43amsince all angles are 2u , let Ø - 2u for ease of typing

I will assume you are proving this as an identity

LS = (1/cos^2 Ø - 1)/(1/cos^2 Ø)

= (1 - cos^2 Ø)/cos^2 Ø * (cos^2 Ø)

= 1 - cos^2 Ø

= sin^2 Ø

= RS

replace Ø with 2u if you have to

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