Saved Bookmarks
| 1. |
यदि `cos 20^(@)-sin 20^(@)=p` हो, तो `cos 40^(@)` का मान होगा-A. `p^(2)sqrt(2-p^(2))`B. `psqrt(2-p^(2))`C. `p+sqrt(2-p^(2))`D. `p-sqrt(2-p^(2))` |
| Answer» Correct Answer - b | |