examples on integrals involving inverse trigonometric functions
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Examples on Integrals Involving Inverse Trigonometric Functions
Examples I
1.
dx
x
x.
1 8
3
cx
dxx
x
dxx
x
441
8
3
41
8
3
arcsin
.1
4
.1
2.
184
3
xx
dxx
cxarc
xx
dxx
xx
dxx
441
84
3
41
84
3
sec
1
4
1
2*
18xx
dx
cxarc
xx
dxx
xx
dx
441
84
3
41
8
sec
1
4
1
3.
dx
x
x.
1 8
3
cx
dxx
x
dxx
x
arctan
.1
4
.1
41
8
3
41
8
3
Examples II
1.
dx
x
x.
49 8
3
cx
dxx
x
dxx
x
dxx
x
)arcsin(
.)(1
.)(1
.49
432
81
2432
338
31
83
2432
3
31
8
3
49 8xx
dx
cxarc
xx
dxx
xx
dxx
xx
dxxx
dx
)sec(
1)(
4
1)(
1)(
49
423
81
24234
23
323
21
41
24234
3
21
2423
21
8
3.
dx
x
x.
34 8
3
cx
dxx
x
dxx
x
dxx
x
)arctan(
.)(1
4
.)(1
.34
423
381
2423
323
41
41
32
2423
3
41
8
3
Examples III
1.
dx
x
x.
2cot9
2csc2
2
cx
dxx
x
dxx
x
dxx
x
)2cotarctan(
.)2cot(1
2)2csc(
.)2cot(1
2csc
.2cot9
2csc
31
61
231
231
91
23
231
2
91
2
2
2.
dx
x
x.
5cos16
5sin2
cx
dxx
x
dxx
x
dxx
x
)5cosarcsin(
.)5cos(1
5)5sin(
.)5cos(1
5sin
.5cos16
5sin
41
51
241
41
41
54
241
41
2
3.
dxx
xx.
7sec225
7tan7sec2
cx
dxx
xx
dxx
xx
dxx
xx
)7secarctan(
)7sec(1
7)7tan7(sec
.)7sec(1
7tan7sec
.7sec225
7tan7sec
52
2351
252
52
251
275
25225
1
2
Examples IV
1.
dx
e
ex
x
.54 6
3
ce
dxe
e
dxe
e
dxe
e
x
x
x
x
x
x
x
)arctan(
.)(1
3
.)(1
.54
325
561
2325
325
41
532
2325
3
41
6
3
2.
dx
e
ex
x
.59 6
3
ce
dxe
e
dxe
e
dxe
e
x
x
x
x
x
x
x
)arcsin(
.)(1
3
.)(1
.59
335
531
2335
335
31
51
2335
3
31
6
3
3.
95 6xe
dx
cearc
ee
dxe
e
dxe
dx
x
xx
x
x
x
)sec(
1)(
3
1)(
95
335
91
23353
35
335
31
31
2335
31
6
Caution!!
Do not Confuse the arcsin formula with the power formula!
Example 1
Notice the difference between the previous integral
And the integral
dx
x
x.
1 8
3
dx
x
x.
1 8
7
cx
dxxx
dxxx
dxx
x
21
8
81
7881
78
8
7
21
21
21
)1(
)8()1(
)1(
.1
Do not Confuse the arcsin formula with the power formula!
Example 2
Notice the difference between the previous integral
And the integral
dxx
x.
5cos16
5sin
cxdxx
x
)5cosarcsin(.5cos16
5sin41
51
2
cx
dxxx
dxxx
dxx
x
215
1
51
21
21
21
)5cos16(
55sin)5cos16(
5sin)5cos16(
.5cos16
5sin
Do not Confuse the arcsin formula with the power formula!
Example 3
Notice the difference between the previous integral
and the integral
cedxe
e x
x
x
)arcsin(.59
335
531
6
3
dx
e
ex
x
3
3
59
ce
dxee
dxee
dxe
e
x
xx
xx
x
x
21
3
151
33151
33
3
3
21
21
21
)59(
)3()5()59(
)59(
59
Do not Confuse the arctan formula with the logarithmic formula!
Example 1
Notice the difference between the previous integral
And the integral
cxdxx
x
441
8
3
arctan.1
dx
x
x.
1 8
7
cx
cx
dxx
x
dxx
x
)1ln(
1ln
.1
8
.1
881
881
8
7
81
8
7
Do not Confuse the arctan formula with the logarithmic formula!
Example 2Notice the difference between the previous
integral
And the integral
Or the integral
cxdxx
x
)2cotarctan(.2cot9
2csc31
61
2
2
dx
x
x.
2cot9
2csc2
dx
x
xx.
2cot9
2csc2cot2
2
cx
dxx
x
dxx
x
2cot9ln
.2cot9
2csc2
.2cot9
2csc
21
2
21
2
cx
dxx
xx
dxx
xx
2cot9ln
.2cot9
2csc2cot4
.2cot9
2csc2cot
241
2
2
41
2
2
Do not Confuse the arctan formula with the logarithmic formula!
Example 3Notice the difference between the previous integral
and the integral
dx
e
ex
x
.54 3
3
cedxe
e xx
x
)arctan(.54
325
561
6
3
ce
ce
dxe
e
dxe
e
x
x
x
x
x
x
)54ln(
54ln
.54
15
.54
3151
3151
3
3
151
3
3