Integration Exercises: Techniques and Solutions for Calculus Mastery, Exercises of Calculus

This resource offers a comprehensive set of integration exercises covering substitution, trigonometric integrals, integration by parts, reduction formulas, trigonometric substitution, rational functions, and the t-method. Problems are designed to enhance understanding and proficiency in integral calculus. Detailed solutions are provided for each exercise, making it an excellent resource for students to practice and master integration skills. It's valuable for improving calculus skills through practice and detailed solutions, providing a thorough review of integration techniques.

Typology: Exercises

2013/2014

Uploaded on 06/25/2025

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Exercise on Integration
1.1 Substitution
Use a suitable substitution to evaluate the following integral.
1. Zdx
25x
2. Ze3x+ 1
ex+ 1 dx
3. Zx
1x2dx
4. Zx23
1 + x3dx
5. Zxdx
(1 + x2)2
6. Zdx
x(1 + x)
7. Z1
x2sin 1
xdx
8. Zxex2dx
9. Z(ln x)2
xdx
10. Zexdx
2 + ex
11. Zcos xdx
1sin x
12. Zsec2x
1 + tan xdx
13. Zdx
x1
14. Zdx
ex+ex
15. Zcos x
xdx
16. Zsin xsec3xdx
17. Ztan xdx
18. Zsec2xcot xdx
19. Zdx
1 + ex
20. Zx(x2+ 2)8dx
21. Zx
25 x2dx
22. Zx
3x2+ 1dx
23. Zx2
9x3dx
24. Zx(x+ 2)7dx
25. Zxdx
4x+ 5
26. Zxx1dx
27. Z(1 sin x) ln(1 + sinx)
cos xdx
28. Z(x+ 2)x1dx
29. Zxdx
x+ 9
30. Zx3(1 + 3x2)1
2dx
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Exercise on Integration

1.1 Substitution

Use a suitable substitution to evaluate the following integral.

dx √ 2 − 5 x

e 3 x

  • 1

ex^ + 1

dx

x √ 1 − x^2

dx

x 2 3

1 + x^3 dx

xdx

(1 + x^2 )^2

dx √ x(1 +

x)

x^2

sin

x

dx

xe −x^2 dx

(ln x) 2

x

dx

exdx

2 + ex

cos xdx √ 1 − sin x

sec 2 x √ 1 + tan x

dx

dx √ x − 1

dx

ex^ + e−x

cos

x √ x

dx

sin x sec 3 xdx

tan xdx

sec 2 x cot xdx

dx

1 + ex

x(x 2

8 dx

x √ 25 − x^2

dx

x √ 3 x^2 + 1

dx

x^2 √ 9 − x^3

dx

x(x + 2) 7 dx

xdx √ 4 x + 5

x

x − 1 dx

(1 − sin x) ln(1 + sin x)

cos x

dx

(x + 2)

x − 1 dx

xdx √ x + 9

x 3 (1 + 3x 2 )

1 (^2) dx

1.2 Trigonometric Integrals

Evaluate

cos 6x sin 4xdx

dx

1 − cos x

sin 5 x cos xdx

sin 3x sin 5xdx

cos

x

2

cos

x

3

dx

cos 3 xdx

sin 4 xdx

(sin x + sec x) 2 dx

sec 2 x tan 2 xdx

sec x tan 3 xdx

tan x

1 + sec x

dx

cot 2 xdx

dx

cos x sin^2 x

sin x cos 3 x

1 + cos^2 x

, dx

tan 5 xdx

1 − tan x

1 + tan x

dx

dx

sin 4 x cos^4 x

, dx

sin 5x cos xdx

cos x cos 2x cos 3xdx

cos 5 x sin 3 xdx

cos 5 x sin 4 xdx

sin 2 x cos 4 xdx

1.3 Integration By Parts

ln xdx

x 2 ln xdx

(ln x) 2

x^2

dx

xe −x dx

x 2 e − 2 x dx

x cos xdx

x^2 sin 2xdx

x 5 e x^3 dx

x sin x cos xdx

(ln x) 2 dx

1.5 Trigonometric Substitution

Evaluate the following integrals by trigonometric substitution.

x^2

1 + x^2

dx

dx

(1 − x^2 )

3 2

4 − 9 x^2 dx

∫ √^

1 + x

1 − x

dx

dx

(1 + x^2 )

3 2

x^2 dx √ 9 − x^2

dx √ 4 + x^2

x 2

16 − x^2 dx

dx

x^2

x^2 + 4

x √ 1 − x

dx

(1 − x 2 )

3 (^2) dx

dx

(2x − x^2 )

3 2

1.6 Rational Functions

Evaluate the following integrals of rational functions.

x^2 dx

1 − x^2

x 2

  • 2x − 1

x − 1

dx

x 3

x + 3

dx

(1 + x) 2

1 + x^2

dx

x(x − 6)

(x − 3)^2

dx

dx

x^2 + 2x − 3

x^2 + 1

x^4 − 2 x^2 + 1

dx

dx

(x^2 − 2)(x^2 + 3)

x + 1

x^2 + 4x + 8

dx

x^2 + 1

(x + 1)^2 (x − 1)

dx

x^2

(x^2 − 3 x + 2)^2

, dx

x^2 + 5x + 4

x^4 + 5x^2 + 4

dx

dx

(x + 1)(x^2 + 1)

2 x^3 − 4 x^2 − x − 3

x^2 − 2 x − 3

dx

4 − 2 x

(x^2 + 1)(x − 1)^2

dx

dx

x(x^2 + 1)^2

x 2 dx

(x − 1)(x − 2)(x − 3)

xdx

x^2 (x^2 − 2 x + 2)

1.7 t-method

Use t-substitution to evaluate the following integrals.

dx

sin 3 x

dx

1 + sin x

dx

sin x cos^4 x

dx

2 + sin x

cos x

1 + cos x

dx

1 − cos x

3 + cos x

dx

dx

4 sin x + 3 cos x

1 + cos x

sin x + cos x

dx

1.8 Miscellaneous

Evaluate the following integrals.

x^3 √ 1 − x^2

dx

x(ln x) 2 dx

x + 4

(x + 1)^2

dx

cos 3 x

sin^2 x

dx

xdx

(1 + x^2 )^2

x^4

4 − x^2

dx

x^3

4 + x^2

dx

e 2 x dx

1 + ex

dx

x(1 + 2 ln x)

dx

2 x

cos 2 x sin 3 xdx

sin 2x

1 + cos^2 x

dx

e

1 x

x^2

dx

sin x

cos^2 x

dx

x sec x tan xdx

x tan 2 xdx

cot x

1 + sin x

dx

tan^3 x

1 + sec x

dx

x 3 dx

x^2 − 1

dx

e^2 x^ + ex^ − 2

ln x

x

1 + ln x

dx

x^2 + 1 dx

Section 1.1: Substitution

1. −^2

5

2 − 5 x + C

2 e^2 x^ − ex^ + x + C

1 − x^2 + C

1 4 (1 +^ x

3 )

4 (^3) + C

1 2(1+x^2 ) +^ C

  1. 2 ln(1 +

x) + C

  1. cos 1 x +^ C

1 2 e

−x^2

  • C

1 3 (ln^ x)

3

  • C
  1. ln(2 + e x ) + C

1 − sin x + C

1 + tan x + C

x + 2 ln |

x − 1 | + C

  1. tan−^1 ex^ + C
  2. 2 sin

x + C

2 sec^2 x + C

  1. − ln | cos x| + C
  2. ln | tan x| + C
  3. x − ln(1 + e x ) + C

(x^2 +2)^9 18 +^ C

25 − x^2 + C

3

3 x^2 + 1 + C

23. −^23

9 − x^3 + C

(x+2)^9 9 −^

(x+2)^8 4 +^ C.

  1. 121 (2x − 5)

4 x + 5 + C

2 15 (x^ −^ 1)

3 / 2 (3x + 2) + C

1 2 (ln(1 + sin^ x))

2 + C

2 5 (x^ −^ 1)

3 / 2 (x + 4) + C

2 3 (x^ −^ 18)

x + 9 + C

135 (3x^2 + 1)

3 / 2 (9x^2 − 2) + C

Section 1.2: Trigonometric Integrals

4 cos 2x − 1 20 cos 10x + C

  1. − cot x 2 +^ C
  2. 16 sin^6 x + C

1 4 sin 2x^ −^

1 16 sin 8x^ +^ C

  1. 3 sin x 6 +^

3 5 sin^

5 x 6 +^ C

  1. sin x − 1 3 sin

3 x + C

3 8 x^ −^

1 4 sin 2x^ +^

1 32 sin 4x^ +^ C

  1. x 2 − sin 2x 4 − 2 ln | cos x| + tan x + C

1 3 tan

(^3) x + C

  1. 13 sec^3 x − sec x + C
    1. − ln(1 + cos x) + C
    2. −x − cot x + C

1 sin x +^

1 2 ln^

1+sin x 1 −sin x +^ C

1 2 cos

(^2) x + 1 2 ln(1 + cos

(^2) x) + C

tan^4 4 −^

tan^2 x 2 −^ ln^ |^ cos^ x|^ +^ C

  1. ln | sin x + cos x| + C
  2. −8 cot 2x − 8 3 cot

(^3 2) x + C

1 8 cos 4x^ −^

1 12 cos 6x^ +^ C

x 4 +^

sin 2x 8 +^

sin 4x 16 +^

sin 6x 24 +^ C

cos^8 (x) 8 −^

cos^6 (x) 6 +^ C

sin^9 (x) 9

2 sin^7 (x) 7

sin^5 (x) 5

+ C 22. −

1 6 cos

(^5) x sin x + 1 24 cos

(^3) x sin x + 1 16 cos x sin x + 1 16 x + C.

Section 1.3: Integration By Parts

  1. x ln x − x + C

x^3 3 (ln^ x^ −^

1 3 ) +^ C

1 x ((ln^ x)

(^2) + 2 ln x + 2) + C

  1. −(x + 1)e −x + C
  2. −e

− 2 x 4 (2x^2 + 2x + 1) + C

  1. x sin x + cos x + C

2 x^2 − 1 4 cos 2x^ +^

x 2 sin 2x^ +^ C

2 x^3 ex

3 − 1 3 ex

3

  • C
  1. 18 sin 2x − 14 x cos 2x + C
  2. x(ln x)^2 − 2 x ln x + 2x + C
  3. x sin − 1 x +

1 − x^2 + C

x 2 +^

1+x^2 2 tan

− 1 x + C

  1. 2 sin

x − 2

x cos

x + C

  1. x ln(x +

1 + x^2 ) −

1 + x^2 + C

  1. x

2 4 −^

x 4 sin 2x^ −^

1 8 cos 2x^ +^ C

x 2 (sin(ln^ x)^ −^ cos(ln^ x)) +^ C

  1. 161 sin 4x − 14 x cos 4x + C

x^2 cos−^1 x 2 +^

sin−^1 x 4 −^

x

√ 1 −x^2 4 +^ C

  1. x tan−^1 x − 1 2 log(x

2 + 1) + C

x^5 ln x 5 −^

x^5 25 +^ C

  1. − ln x 3 x^3 −^

1 9 x^3 +^ C

  1. x tan x + ln(cos x) + C

1 13 e

2 x(3 sin 3x + 2 cos 3x) + C.

  1. 2(x − 2) sin

x + 4

x cos

x + C

Section 1.5: Trigonometric Substitution

  1. x − tan−^1 x + C
  2. √x 1 −x^2

+ C

x

√ 4 − 9 x^2 2 +^

2 3 sin

−1 3x 2 +^ C

1 − x^2 + sin − 1 x + C

√x 1+x^2

+ C

9 2 sin

− 1 x 3 −^

x 2

9 − x^2 + C

  1. ln |x +

4 + x^2 | + C

16 − x^2

x^3 4 −^2 x

+32 sin−^1

x 4

+C

√ x^2 + 4 x +^ C

x

1 − x − tan − 1

√ √^1 −x x +^ C

x(1−x^2 )

3 2 4

3 x(1−x^2 )

1 2 8

8 sin−^1 x + C

√x−^1 2 x−x^2

Section 1.6: Rational Functions

  1. −x + 1 2 ln^ |

1+x 1 −x |^ +^ C

x^2 2 + 3x^ + 2 ln^ |x^ −^1 |^ +^ C

  1. 9x − 32 x^2 + 13 x^3 − 27 ln |x + 3| + C
    1. x + ln(1 + x^2 ) + C
    2. x + 9 x− 3 +^ C
    3. 14 ln |x x−+3^1 | + C

x

√ x^2 + 2 −^

9 2 ln^ |x^ +^

x^2 + 9| + C

x(x^2 +10)

√ x^2 + 4 + 6 ln(x^ +^

x^2 + 4) + C

  1. ln(1 +

1 − x^2 ) −

1 − x^2 + C

  1. sin − 1 x − 1 −

√ 1 −x^2 x +^ C

  1. ln | sin x| − 1 2 sin

2 x + C

  1. x + 17 ln |x − 3 | − 12 ln |x − 2 | + C
  2. x − 2

x + 2 ln(1 +

x) + C

  1. 23 (x − 2)

3 (^2) + 4(x − 2)

1 (^2) + C

  1. x − 2 ln(1 +

1 + ex) + C

  1. x 2 (cos(ln x) + sin(ln x)) + C

1 4 x(1−x

2 )

3 (^2) + 3 8 x

1 − x^2 + 3 8 sin

− 1 x+C

1 2 tan

− 1 (x + 1) + 1 2 tan

− 1 (x − 1) + C

x^2 9 +^

x sin 6x 12 +^

cos 6x 72 +^ C

x 2 +^

1 2 ln^ |^ sin^ x^ + cos^ x|^ +^ C

  1. −2 sin − 1 e − x 2 + C

√ 4 −x^2 x +^ C

  1. sin −1 1 x +^ C

1 x −^ 2 ln^ |x|^ + 2 ln^ |x^ −^1 |^ +^ C

1 3 sec

(^3) x + C

3 tan^3 x − tan x + x + C

1 2 sec^ x^ tan^ x^ −^

1 2 ln^ |^ sec^ x^ + tan^ x|^ +^ C

3 x^2 (x^2 + 1)

3 (^2) − 2 15 (x^2 + 1)

5 (^2) + C

1 10 cos 5x^ −^

1 2 cos^ x^ +^ C

  1. 12 x^2 − ln |x| + 12 ln(x^2 + 1) + C

1 3 (x

2 + 4)^32 − 4

x^2 + C

  1. 14 ln |x + 1| − 14 ln |x − 1 | − (^) 2(xx (^2) −1) + C

x − 2 ln(1 +

x) + C

x sin

x + 2 cos

x + C

  1. − 2 x + x ln(1 + x^2 ) + 2 tan−^1 x + C
  2. ln |

x − 1 | − ln |

x + 1| + C

1 3 x

3 tan − 1 x − 1 6 x

2

1 6 ln(x

2

      • C
  1. (x + 1) tan−^1

x −

x + C

  1. sin

x −

x

1 − x + C

x + 1 + ln |

x − 1 | − ln |

x + 1| + C

x + ln |1 + x| − 2 tan−^1

x + C

1 4 sin

x − 1 4

x

1 − x(1 − 2 x) + C