1.

d/(dx) ("Tan"^(-1) (x)/(sqrt(a^2 - x^2)))=

Answer»

`1/(SQRT(a^2 + X^2))`
`(-1)/(sqrt(a^2 + x^2))`
`(x)/(sqrt(a^2 - x^2))`
`(1)/(sqrt(a^2 - x^2))`

ANSWER :D


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