# How do you find the value of cos ((pi)/2) using the graph?

${180}^{o} \text{ is "pi" radians. So "pi/2" is } {90}^{o}$
$\cos \left(\frac{\pi}{2}\right) \text{ "->" "(x,y)" "->" } \left(\frac{\pi}{2} , 0\right)$
The cos(x)"" is the value you read off from the y axis