1.

`tan^(-1)""(x)/(sqrt(a^(2)-x^(2))),|x|lta` को सरलतम रूप में लिखे |

Answer» `x = a sin theta,` रखने पर,
`tan^(-1)""(x)/(sqrt(a^(2)-x^(2)))=tan^(-1)""(asintheta)/(sqrt(a^(2) - a^(2) sin^(2)theta)) = tan^(-1) ""(a sin theta)/(sqrt(a^(2) (1-sin^(2)theta)))`
` = tan^(-1)((a sin theta)/(a cos theta)) = tan^(-1) (tan theta) = theta = sin^(-1)""(x)/(a)`


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