Open Question: I cannot evaluate the following integral. e^2x(sin7x) dx. Each time i am receiving a more complex answer.?
15:40 Publicado por Nadim
Use the formula
? e^(ax)sin(bx)dx
....e^(ax)
= --------------- [asin(bx) - bcos(bx)] + C
...a^2 + b^2
let a= 2 and b = 7
....e^(2x)
=--------------- [2sin(7x) - 7cos(7x)] + C
...2^2 + 7^2
=1/53e^(2x)[2sin(7x) - 7cos(7x)] +C answer//
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