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Evaluate the integrals
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When x = 0, t = 1 and when x = 1, t = 2

Evaluate the integrals
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Also, let ![]()

Evaluate the integrals
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Also, let x = tanθ ⇒ dx = sec2θ dθ
When x = 0, θ = 0 and when x = 1, ![]()

Takingθas first function and sec2θ as second function and integrating by parts, we obtain

Evaluate the integrals
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Let x + 2 = t2 ⇒ dx = 2tdt
When x = 0, ![]() and when x = 2, t = 2
 and when x = 2, t = 2

Evaluate the integrals
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Let cos x = t ⇒ −sinx dx = dt
When x = 0, t = 1 and when![]()

Evaluate the integrals
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Let ![]() ⇒ dx = dt
⇒ dx = dt

Evaluate the integrals
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Let x + 1 = t ⇒ dx = dt
When x = −1, t = 0 and when x = 1, t = 2

Evaluate the integrals
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Let 2x = t ⇒ 2dx = dt
When x = 1, t = 2 and when x = 2, t = 4

The value of the integral  is
 is
A. 6
B. 0
C. 3
D. 4


Let cotθ = t ⇒ −cosec2θ dθ= dt

Hence, the correct answer is A.
If ![]()
A. cos x + x sin x
B. x sin x
C. x cos x
D. sin x + x cos x
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Integrating by parts, we obtain

Hence, the correct answer is B.
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