Trig
posted by Elle .
Verify the identity.
1/(tanxsecx) + 1/(tanx+secx) = 2tanx

Trig 
Steve
recall that
(ab)(a+b) = a^2b^2
sec^2(x)  1 = tan^2(x)
put the fractions over a common denominator and watch the answer fall out.
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