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Chapter 37. Further methods of integration . “ Life is either a daring adventure or nothing .” -- Helen Keller. You must memorise the following learned formula [ forever ] :. 1. 2 . 3 . 4 . 5 . 6 . 7 . 8 . Take note. 9. Take note. 5 basic methods of integration.
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Chapter 37 Further methods of integration By Chtan FYHS-Kulai
“Life is either a daring adventure or nothing.” -- Helen Keller By Chtan FYHS-Kulai
You must memorise the following learned formula [forever] : By Chtan FYHS-Kulai
1. By Chtan FYHS-Kulai
2. By Chtan FYHS-Kulai
3. By Chtan FYHS-Kulai
4. By Chtan FYHS-Kulai
5. By Chtan FYHS-Kulai
6. By Chtan FYHS-Kulai
7. By Chtan FYHS-Kulai
8. Take note By Chtan FYHS-Kulai
9. Take note By Chtan FYHS-Kulai
5 basic methods of integration 1. Integration by means of standard forms. 2. Integration by the use of partial fractions. 3.Integration by substitution. 4.Integration by parts. 5.Integration by use of reduction formulae. By Chtan FYHS-Kulai
Method of substitution By Chtan FYHS-Kulai
Integration by substitution: e.g. 1 Soln : Let By Chtan FYHS-Kulai
e.g. 2 By using the substitution , evaluate . Soln : By Chtan FYHS-Kulai
e.g. 3 Evaluate using the substitution cosx=c . Soln : By Chtan FYHS-Kulai
When When By Chtan FYHS-Kulai
Some common types of substitutions : (1) Of the form Let By Chtan FYHS-Kulai
(2) Of the form or Let By Chtan FYHS-Kulai
(3) Of the form or Let By Chtan FYHS-Kulai
(4) Of the form or Let By Chtan FYHS-Kulai
(5) Of odd powers of sine or cosine Let respectively By Chtan FYHS-Kulai
(6) Of the form or Let By Chtan FYHS-Kulai
(7) Of the form Let By Chtan FYHS-Kulai
(8) Of the form Let By Chtan FYHS-Kulai
e.g. 4 Evaluate , assuming . See slide #21 Soln : Use type 2 Let By Chtan FYHS-Kulai
e.g. 5 Evaluate . Soln : See slide #25 Use type 6 By Chtan FYHS-Kulai
Let Do you know how to get this? By Chtan FYHS-Kulai
and By Chtan FYHS-Kulai
When x=∏/2, t=1, when x=0, t=0 By Chtan FYHS-Kulai
e.g. 6 Integrate the function . Soln : By Chtan FYHS-Kulai
e.g. 7 Integrate the function . Soln : By Chtan FYHS-Kulai
You can further simplify this answer, By Chtan FYHS-Kulai
e.g. 8 Evaluate . By Chtan FYHS-Kulai
Soln : Let By Chtan FYHS-Kulai
x 1 By Chtan FYHS-Kulai
Integration by parts By Chtan FYHS-Kulai
In S1S, you have this : So, we have, By Chtan FYHS-Kulai
Since So, and, By Chtan FYHS-Kulai
Geometrically in terms of areas : u v 0 By Chtan FYHS-Kulai
e.g. 9 Soln : Let By Chtan FYHS-Kulai
Note : It is customary to drop the first constant of integration when determining v. By Chtan FYHS-Kulai