I know that the antiderivative is cos^2(x) is (x+cos(x)sin(x))/2, but how the heck can you derive it?
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Originally Posted by jagged I know that the antiderivative is cos^2(x) is (x+cos(x)sin(x))/2, but how the heck can you derive it? Make the appropriate substitution suggested by the double angle formula: . Then, after integrating, make the substitution in your answer.
thanks... ive forgotten basic methods of integration since spring break
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