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May 23, 2015

Homework Help: Trig Identities

Posted by Donovan on Tuesday, January 6, 2009 at 6:46am.

Please help...I'm not understanding trig identities and how to manipulate and express these two problems in their associated functions.

Thanks

a)Express as a function of cos (theta)

2 sin^2(theta) - 1


b)Express as a function of sin (theta) or cos (theta)

tan^2(theta) - 2 sec(theta)sin(theta)

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