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http://functions.wolfram.com/01.08.21.0095.01
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Integrate[1/(a + b Tan[c z])^2, z] ==
(a^2 ((a^2 - b^2) c z + 2 a b Log[a Cos[c z] + b Sin[c z]]) +
b (a^2 b + b^3 + a^3 c z - a b^2 c z +
2 a^2 b Log[a Cos[c z] + b Sin[c z]]) Tan[c z])/
(a (a^2 + b^2)^2 c (a + b Tan[c z]))
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Date Added to functions.wolfram.com (modification date)
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