InterviewSolution
Saved Bookmarks
| 1. |
सिद्ध कीजिए `"tan"^(-1)1+"tan"^(-1)1/2+"tan"^(-1)1/3=(pi)/2` |
|
Answer» बायां पक्ष`="tan"^(-1)1+"tan"^(-1) 1/2+"tan"^(-1) 1/3` `="tan"^(-1)(1+1/2)/(1-1 1/2)+"tan"^(-1)1/3` `="tan"^(-1)(3/2)/(1/2)+"tan"^(-1)1/3="tan"^(-1)3+"tan"^(-1)1/3="tan"^(-1)(3+1/3)/(1-3 1/3)` `="tan"^(-1) (10/3)/(1-1)="tan"^(-1)(10/3)/0="tan"^(-1) oo=90^(@)=(pi)/2` `=` दायां पक्ष। |
|