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kellzz
verify 1+sec^2xsin^2x=sec^2x
use the substitution sin^2(x) = 1 - cos^2(x) and you also need to know sec^2(x) = 1/cos^2(x) so the left hand side becomes 1 + 1/cos^2(x)(1 - cos^2(x)) distribute and simplify for your answer