Evaluate the indefinite integral by using the given substitution to reduce the integral to standard from.

∫14csc^{2}(7x)cot(7x)dx,

a. u = cot(7x),

b. u = csc(7x)

**Solution:-**

Using u = cot(7x), ∫14csc^{2}(7x)cot(7x)dx = -cot^{2}(7x)+C

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# Problem 853

learn maths and leave the fear of it

Evaluate the indefinite integral by using the given substitution to reduce the integral to standard from.

∫14csc^{2}(7x)cot(7x)dx,

a. u = cot(7x),

b. u = csc(7x)

**Solution:-**

Using u = cot(7x), ∫14csc^{2}(7x)cot(7x)dx = -cot^{2}(7x)+C