00:01
In this problem, we need to find the indefinite integral of the following function and have to choose out of the given options.
00:08
So the given problem is cosine of 5s, ds, and this is an indefinite integral, we need to solve it.
00:19
So, in order to solve this problem, we will use integration by substitution and hence we will plug in that let 5s is equals to u.
00:31
So, if we differentiate both the side, we can write that 5ds will be equals to d .u.
00:38
And hence, ds will be equals to du over 5.
00:44
So, we have here done the substitution method.
00:48
So now, if we substitute these values in the above given equation, the equation will be like...