1 / | | 3 / 4\ | x *sin\x / dx | / 0
Integral(x^3*sin(x^4), (x, 0, 1))
Let .
Then let and substitute :
The integral of a constant times a function is the constant times the integral of the function:
The integral of sine is negative cosine:
So, the result is:
Now substitute back in:
Add the constant of integration:
The answer is:
/ | / 4\ | 3 / 4\ cos\x / | x *sin\x / dx = C - ------- | 4 /
1 cos(1) - - ------ 4 4
=
1 cos(1) - - ------ 4 4
1/4 - cos(1)/4
Use the examples entering the upper and lower limits of integration.