1-cos(^2)x/(cos(^2)x) - 1. How do I simplify this to sec(^2)x -2?
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I assume it's .
How did you get from step one to 2? Yes, that is correct.
What do you mean by steps 1 and 2?
For all a, b and c, . Also, (if ).
We will need a few identities: . . . . . . . . . .
Why would we need those identities? To simplify the original expression one only needs the definition of sec.
emakarov's approach is the way to go.
and again finish with
Last edited by Archie Meade; September 26th 2011 at 03:54 AM.
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