Question

help calculus

Answer 1

@Hero

Answer 2

@Hero

Answer 3

1) your first one is correct

2) \[\int_{0}^{\pi/4}[\cos(x)-\sin(x)]dx\]

3) \[\int_{a}^{b}\pi f(x)^2dx\]

4) solve \(x^2=x\)...ie x=0,1...then

\[\int_{0}^{1}2\pi r (top-bottom)dx\]