Given
if then
Even function
use
Period of |sinx| is π
Therefore, the integration becomes
= (-9) *(-1)*( [cosx]x=2π – [cosx]x=π)
= 9 * (1 – (-1))
= 18
Given
if from
If
use
If 0 < a < c, 0 < b < c then
Put x4 =t
If
Sin x = t
Split into two integrals
Put 1/x= t
Log x = t
If and
Given function is odd
x11 cos x is an odd function.
The function is
Solution we know that if f(t) is an odd function the dt is given integral since
is odd, the given integral is even
Value of
Given
use formula
Using
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