InterviewSolution
Saved Bookmarks
| 1. |
`(dy)/(dx)` ज्ञात कीजिए : `y=sec^(-1)((1)/(2x^(2)-1)), 0 lt x lt (1)/(sqrt2)` |
|
Answer» `y=sec^(-1)((1)/(2x^(2)-1))" "{:("माना "x=tan theta),(rArr theta= tan^(-1)x):}` `rArr" "y=sec^(-1)((1)/(2cos^(2) theta-1))` `=sec^(-1)((1)/(cos 2 theta))=sec^(-1)(sec 2 theta)` `=2 theta= 2 cos^(-1)x` `rArr" "(dy)/(dx)=2(d)/(dx)cos^(-1)x=(2)/(sqrt(1-x^(2)))` |
|