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1 8 2 Trig Integrals By now you should be able to integrate the basic trig functions and know the appropriate identities for integrating the squares of the trig functions To integrate higher powers of trig functions the key is if possible to save a derivative du of a trig function u and rewrite the rest of the integral in terms of u Examples sin3 x dx 4 tan2 x sec4 x dx 0 Key Identities to Compute Product to Sum Integrals sin A B cos A B These are extremely important in the study of Partial Differential Equations 1 Examples sin 3x cos 5x dx Compute On Beyond Average cos4 x dx csc6 x dx 2
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