Answer to Question #223864 in Chemical Engineering for Lokika

Question

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

Answer 1

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