# Thread: question regarding derivatives of arc function

1. ## question regarding derivatives of arc function

By using the derivative investigate the function f(x)=arccos(sinx) , give its piece-wise formula for 0≤ x ≤ 2pi.

Can someone help me with this question? I don't recall ever working arc so if anyone can help me that would be greatly appreciated.

2. Originally Posted by Solid8Snake
By using the derivative investigate the function f(x)=arccos(sinx) , give its piece-wise formula for 0≤ x ≤ 2pi.

Can someone help me with this question? I don't recall ever working arc so if anyone can help me that would be greatly appreciated.
$\arccos (\sin x)$ means the same thing as $\cos^{-1} (\sin x)$.