sin x P47. Let I = cos.x dx and J = J% sin x+cos dx, a e [0, ). sin x+cos x (a) By considering I+J and I-J, find the value of I. (b) Evaluate f/2 dx. a sin x+bcos.x cos x (c) Evaluate 2 cos x+4 dx. 3 sin x+4 cos.x+25

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