Saved Bookmarks
| 1. |
Let f:R→R be defined as f(x+y)+f(x−y)=2f(x)f(y), f(12)=−1. Then the value of 20∑k=11sin(k)sin(k+f(k)) is equal to |
|
Answer» Let f:R→R be defined as f(x+y)+f(x−y)=2f(x)f(y), f(12)=−1. Then the value of 20∑k=11sin(k)sin(k+f(k)) is equal to |
|