3 sin x + 3cos x in the form Asin ( x +α) and finds one ... (sin8x − sin2x) dx ... sin x dx. ⌡0. ⌡0. ⎛ π π. ⎞. ⌠⎜ 6 1 + cos4x. ⌠ 6 1 − cos2x.
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