Integral Calculus Question 89

Question: To find the value of $ \int_{{}}^{{}}{\frac{dx}{x\sqrt{2ax-x^{2}}}} $ , the suitable substitution is

Options:

A) $ x=a\cos t $

B) $ x=2a\cos t $

C) $ x=2at $

D) $ x=2a{{\sin }^{2}}t $

Show Answer

Answer:

Correct Answer: D

Solution:

To evaluate $ \int_{{}}^{{}}{\frac{dx}{x\sqrt{2ax-x^{2}}}}, $ the suitable substitution is $ (2a{{\sin }^{2}}t=x). $