

InterviewSolution
Saved Bookmarks
1. |
The value of `tan{(cos^(- 1)(-2/7)-pi/2)]` is |
Answer» Correct Answer - `(2)/(3sqrt5)` `tan {(cos^(-1)(-(2)/(7)) - (pi)/(2))}` `= tan {pi - cos^(-1) ((2)/(7)) - (pi)/(2)}` `= tan {(pi)/(2) - cos^(-1) ((2)/(7))}` `= tan {sin^(-1) ((2)/(7))}` `= tan tan^(-1) ((2)/(3sqrt5)) = (2)/(3sqrt5)` |
|