# Thread: Limit represent the derivative of some fuction.

1. ## Limit represent the derivative of some fuction.

At first I thought that it is (a) but then i realized that even if it's derivative it is possible that it wont turn out to be cos. If I am correct this time, the answer should be (c) f(x)=sin(x), a= pie/4
am i correct? thank you!!!

2. Originally Posted by greenbee
At first I thought that it is (a) but then i realized that even if it's derivative it is possible that it wont turn out to be cos. If I am correct this time, the answer should be (c) f(x)=sin(x), a= pie/4
am i correct?
No, that not correct.
The answer is staring you in the face.