Interactive: Derivative of Cosine

Derivative of the Sine Function:

$$\frac{d}{{dx}}\left( {\cos x} \right) = - \sin x$$

Instructions: Drag P along $f(x) = cos(x)$ to see that the slope of the tangent line through it traces out $f'(x) = -sin(x)$.

0,0

 –  o  +  ←  ↓  ↑  → 

π

0.5π

1.5π

2π

0.5

-0.5

1

-1

-1.5

P

m = 0.00