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Integrate cos^2(x)

1/4sin(2x) + x/2 + c

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What is the area under the graph of (x^2)*sin(x) between 0 and pi

i) It is given that f(x)=(-5-33x)/((1+x)(1+5x)), express f(x) in the form A/(1+x) + B/(1+5x) where A,B are integers. ii) hence express the integral of f(x) between x=3 and x=0 in the form (p/q)ln4 where p,q are integers.

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