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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
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Use a suitable substitution to evaluate the following integral.
dx √ 2 − 5 x
e 3 x
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
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
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
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
Evaluate the following integrals of rational functions.
x^2 dx
1 − x^2
x 2
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)
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
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
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
x) + C
1 2 e
−x^2
1 3 (ln^ x)
3
1 − sin x + C
1 + tan x + C
x + 2 ln |
x − 1 | + C
x + C
2 sec^2 x + C
(x^2 +2)^9 18 +^ C
25 − x^2 + C
3
3 x^2 + 1 + C
9 − x^3 + C
(x+2)^9 9 −^
(x+2)^8 4 +^ C.
4 x + 5 + C
2 15 (x^ −^ 1)
3 / 2 (3x + 2) + C
1 2 (ln(1 + sin^ x))
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 4 sin 2x^ −^
1 16 sin 8x^ +^ C
3 5 sin^
5 x 6 +^ C
3 x + C
3 8 x^ −^
1 4 sin 2x^ +^
1 32 sin 4x^ +^ C
1 3 tan
(^3) 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
(^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
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
x^3 3 (ln^ x^ −^
1 3 ) +^ C
1 x ((ln^ x)
(^2) + 2 ln x + 2) + C
− 2 x 4 (2x^2 + 2x + 1) + C
2 x^2 − 1 4 cos 2x^ +^
x 2 sin 2x^ +^ C
2 x^3 ex
3 − 1 3 ex
3
1 − x^2 + C
x 2 +^
1+x^2 2 tan
− 1 x + C
x − 2
x cos
x + C
1 + x^2 ) −
1 + x^2 + C
2 4 −^
x 4 sin 2x^ −^
1 8 cos 2x^ +^ C
x 2 (sin(ln^ x)^ −^ cos(ln^ x)) +^ C
x^2 cos−^1 x 2 +^
sin−^1 x 4 −^
x
√ 1 −x^2 4 +^ C
x^5 ln x 5 −^
x^5 25 +^ C
1 9 x^3 +^ C
1 13 e
2 x(3 sin 3x + 2 cos 3x) + C.
x + 4
x cos
x + C
Section 1.5: Trigonometric Substitution
x
√ 4 − 9 x^2 2 +^
2 3 sin
−1 3x 2 +^ C
1 − x^2 + sin − 1 x + C
√x 1+x^2
9 2 sin
− 1 x 3 −^
x 2
9 − x^2 + C
4 + x^2 | + C
16 − x^2
x^3 4 −^2 x
+32 sin−^1
x 4
√ 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 −x |^ +^ C
x^2 2 + 3x^ + 2 ln^ |x^ −^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 − x^2 ) −
1 − x^2 + C
√ 1 −x^2 x +^ C
2 x + C
x + 2 ln(1 +
x) + C
3 (^2) + 4(x − 2)
1 (^2) + C
1 + ex) + 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
√ 4 −x^2 x +^ C
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 3 (x
x^2 + C
x − 2 ln(1 +
x) + C
x sin
x + 2 cos
x + C
x − 1 | − ln |
x + 1| + C
1 3 x
3 tan − 1 x − 1 6 x
2
1 6 ln(x
2
x −
x + C
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