INTEGRAL CALCULUS: REVIEW OF GENERAL INTEGRATION
#1
cscxdx #2
sin 2x dx2 #3
sec3xdx #4
1 cos2 xdx#5 2
1 9dx x
#6 10
arctanx dx
#7 2
1
25dx x
#8
lnxdx#9
sin2xcos5x dx #10
1 cos8x dx#11
x2 3x xdx #12
sinh3xcoshxdx#13 3 12
2
x dx
x x
#14
8 8x4x32dx#15
0
2
4
1 dx
x
#16 20
2 dx
x
ANSWERS on NEXT PAGE (or BACK)
ANSWERS
#1 ln cscxcotx C #2 12x 18 sin 4 x C
#3 12secxtanxln secxtanx C #4 2sin 2x C
#5 ln x239 3x C or ln x2 9 x C #6 π4 12ln2
#7 ln 5x 5x 2 1 C or lnx x225 C #8 xlnx x C
#9 13sin3x 25 sin5x 17 sin7x C #10 42sin 4x C
#11 25 x5 32 3 x2 C #12 14sinh4x C
#13 21x 34 ln x 34 lnx 2 C #14 167 8
x4 2
7 C#15 2π
#16
Ω Ω0Ω 2 Ω 2
0
lim 1 lim ln 2 | ln2 diverges
2 dx x
x
Problem #16 is improper. Here is the unbounded area.
The graph below helps evaluate the limit on the last step of #16.