I have a proof in my trig book, that I am completely stumped on! I'm sure I am missing something easy, but just can't seem to get there. sec^2(x)=(sec(2x))(2-sec^2(x)) Any hints? Thanks!
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Originally Posted by tshenura Any hints? What do you know being equal to? Table of Trigonometric Identities
Use the relation, , and simplify.
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