Saturday, December 31, 2011

integral of (cos x)^3

integral of (cos x)^3

the (cosx)^3 is split into (cos²x )cosx

the cos²x is written as 1 - sin²x (using trigonometry formulae)

then the substitution t = sinx , dt=cosx dx is used

more explanation is given below

click here for integration formulae

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