Finding derivative of a rational trig function

AleX_X

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Nov 5, 2011
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Hi, I am having some trouble getting the same solution that is in the solutions manual for my book. Here is the problem:

y=(sec(2θ))/(1+tan(2θ))

so far i have:
+JhfMnpEiIBCDToAACDOX3NSzaKh8dDEAAAAAElFTkSuQmCC


9pMAAAAASUVORK5CYII=


9KQ+KvCO8hiH1kDyocl328cA+M10Oha7LPjbYZ6bLodB12ccG+8x0ORS6NDs4YYc51oFaE7IRP29v3V873DQNAAAAAElFTkSuQmCC


enB8gAAAAASUVORK5CYII=


In the solution manual it says that it can be further simplified to.

rzJ+LUTas1Q9TPZZZW0ERmmIuYqPLrJyk3b5V0ifdzNJpNeP9Uwbf4mwL49fJrEXIV7vSfiw09m8ALOF54mWynzEKTJ5iFNNi1z5V8oJwYB4SF2iQJOFr5ARRKr4wuCuKggQ9mUvgAAAABJRU5ErkJggg==


But I can't figure out how they simplified the solution to that. I'd appreciate if someone could explain to me what is done to get to that simplification, thank you.
 
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