Phanindra
Last Activity: 6 Years ago
Use by parts...
Take log(cosx) as first function and 1 as second function....
By parts formula is ∫f(x).g(x) = f(x).g'(x) - ∫f'(x).[∫g(x)dx]dx...
And 1st and 2nd function are taken using. ILATE...
I = inverse trigonometric function
L = logarithmic function
A = algebraic function
T = trigonometric function
E = exponential function. ..
You will definitely get the answer...