# INTEGRATION PRACTICE WORKSHEET

Integration Practice Worksheet :

Here we are going to see some example problems in integration.

To find the formulas used in integration, please visit the page "Integration Formulas for Class 12"

## Integration Practice Worksheet - Questions

Question 1 :

Integrate the following with respect to x

∫ [(x + 4)5 + 5/(2 - 5x)4 - cosec2(3x - 1)] dx

Solution :

∫ [(x + 4)+ 5/(2 - 5x)4 - cosec2(3x - 1)] dx

=  (x + 4)5 dx +  ∫(5/(2 - 5x)4) dx -  cosec2(3x - 1) dx

=  (x + 4)6/6 +  5∫(2 - 5x)-4 dx -  cosec2(3x - 1) dx

=  (x + 4)6/6 +  5(2-5x)-3/(-3)(-5) dx -  cot(3x-1)/(-3) + c

=  (1/6)(x + 4)6 - (1/3)(1/(2-5x)3) + (1/3) cot(3x-1) + c

Question 2 :

Integrate the following with respect to x

∫ [4 cos (5-2x) + 9e3x-6 + 24/(6-4x)] dx

Solution :

∫ [4 cos (5-2x) + 9e3x-6 + 24/(6-4x)] dx

=  ∫ 4 cos (5-2x) dx + 9 ∫ e3x-6dx + 24/(6-4x) dx

=  4 sin (5 - 2x)/(-2) + 9 e3x-6/3 + 24 log (6 - 4x)(-1/4) + c

=  -2 sin (5 - 2x) + 3 e3x-6 - 6 log (6 - 4x) + c

Question 3 :

Integrate the following with respect to x

∫ [sec2(x/5) + 18 cos 2x  + 10 sec (5x + 3) tan (5x + 3)] dx

Solution :

∫ [sec2(x/5) + 18 cos 2x  + 10 sec (5x + 3) tan (5x + 3)] dx

∫sec2(x/5)dx+18cos 2xdx+10sec(5x+3)tan(5x+3)] dx

=  tan (x/5)/(1/5)+(18/2)sin 2x+(10/5) sec (5x+3) + c

=  5 tan (x/5) + 9 sin 2x + 2 sec (5x+3) + c

Question 4 :

Integrate the following with respect to x

∫ [8/√(1 - (4x)2) + 27/√(1 - 9x2) - 15/(1+25x2)] dx

Solution :

=  ∫8/√(1-(4x)2) dx+27/√(1-9x2) dx-15/(1+25x2) dx

=  8∫1/√(1-(4x)2)dx+27∫1/√(1-(3x)2) dx-15∫1/(1+(5x)2) dx

=  (8/4)sin-1(4x) + (27/3) sin-1(3x) - (15/5) tan-1(5x) + c

=  2 sin-1(4x) + 9 sin-1(3x) - 3 tan-1(5x) + c

Question 5 :

Integrate the following with respect to x

∫ [6/(1 + (3x + 2)2)] - [12/√1 - (3-4x)2] dx

Solution :

=  ∫ [6/(1 + (3x + 2)2)] - [12/√1 - (3-4x)2] dx

=  6∫[1/(1 + (3x + 2)2)] - 12 [1 √1 - (3-4x)2] dx

=  (6/3) tan-1(3x+2) - (12/(-4)) sin-1(3-4x) + c

=  2 tan-1(3x+2) + 3 sin-1(3-4x) + c

Question 6 :

Integrate the following with respect to x

∫ (1/3) cos ((x/3) - 4)) + 7/(7x+9) + e(x/5) + 3 dx

Solution :

=  ∫ (1/3) cos ((x/3) - 4)) dx + 7/(7x+9) dx + e(x/5)+3 dx

= (1/3)/(1/3)sin((x/3)-4))+(7/7)log(7x+9) + (1/5)e(x/5) + 3+c

= (1/3)/(1/3)sin((x/3)-4))+log(7x+9) + 5e(x/5) + 3+c

After having gone through the stuff given above, we hope that the students would have understood, "Integration Practice Worksheet"

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