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what do we mean by substitution in integration

what do we mean by substitution in integration

Grade:12th pass

2 Answers

grenade
2061 Points
8 years ago
A change in the variable of integration often reduces an integral to one of the fundamental integrals. The method in which you change the variable to some other variable is called the method of substitution. When the integrand involves some trigonometric functions, you can some well known identities to find the integrals. 
ng29
1698 Points
8 years ago
Integration by Substitution" (also called "u-substitution") is a method to find an integral ,but only when it can be set up in a special way.
When the integrand involves some trigonometric functions, you can some well known identities to find the integrals. 

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