Example 1.16
Find F (x) for the following:
cos x 3
F (x) = 1 + t dt. (1.110)
sin x
We can set g (x) = sin x and h(x) = cos x. It is also clear that f (x, t) is a
function of t only. Using Leibnitz rule (1.106) we find that
F (x) = −sin x1 + cos3 x − cos x1 + sin3 x. (1.111)