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| Math Central | Quandaries & Queries |
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Question from Evan, a student: Could you please help me with the following question Prove that this is an identity... sec2x = sec^2x / 2 - sec^2x |
Evan,
On both sides write sec(A) as 1/cos(A). On the right side simplify by multiplying the numerator and denominator by cos2(x).
Harley
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