00:01
Okay, this we do by parts.
00:03
So the 5x will be the u, the cosax squared x is the dv by the x.
00:12
So what we get then will be u times v, so 5x, no change.
00:19
I integrate co -sequent squared x.
00:23
I'll get negative cot x.
00:28
Differentiate cot, i get negative cosax squared, minus the integral.
00:33
Of negative cot x differentiate 5x and the limits of pi by 2 and 5 5.
00:49
So what we have then will be minus 5x cot x plus pi integral x x pi by 2, 5 by 4.
01:18
Now, negative 5x, cot x again.
01:26
And cot is cos over sign.
01:29
So that becomes ln of sine...