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anonymous
 3 years ago
Integration Problem...HELP!!!
anonymous
 3 years ago
Integration Problem...HELP!!!

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1361641769890:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0use the identity \[\frac{1}{2}\cos(AB)\cos(A+B)=\cos(A)\cos(B)\]

TuringTest
 3 years ago
Best ResponseYou've already chosen the best response.0\[\frac{1}{2}[\cos(AB)+\cos(A+B)]=\cos(A)\cos(B)\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Isn't that an identity for sin? Is it the same for cos?

TuringTest
 3 years ago
Best ResponseYou've already chosen the best response.0there are 4 essential sum to product formulas http://tutorial.math.lamar.edu/pdf/Trig_Cheat_Sheet.pdf
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