Question #223864

Evaluate ∫0^{π/2a}asinαxdx,α>0 by using Leibniz formula.`

Expert's answer

"\\int_0^{\u03c0\/2a}a\\sin axdx=\\cos ax|_0^{\\pi\/2a}\\\\=\\cos \\pi\/2-\\cos 0=0-1=-1"

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