Victoria V. answered • 03/22/21
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20+ years teaching Calculus
please see video
Jo G.
asked • 03/22/21if ∫f(x)(cos x) dx = f(x) (sin x) - ∫6x (sin x) dx, then f(x) could be?
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Bradford T. answered • 03/22/21
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Retired Engineer / Upper level math instructor
Comparing to the integration by parts formula, looks like u = f(x) and dv = cos(x)dx
du = 6xdx so f(x) could be the antiderivative of 6x=3x2.
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