Identify cosine function from set of ordered pairs: 

$(0,1),(\pi,\frac{1}{2}),(\frac{3\pi}{2},0)$

Identify cosine function from set of ordered pairs: 

$(0,1),(\frac{\pi}{4}و\frac{1}{\sqrt{2}}),(\pi,-1)$

Identify cosine function from set of ordered pairs:

$(0,1),(\frac{\pi}{3},\frac{1}{2}),(\frac{\pi}{2},0).$

$Does\ the\ set\ of\ ordered\ pairs\ \left\{(-3\pi,0),(-2\pi,2),(-\pi,0),(0,2)\right\}\exp resses\ a\ \cos ine\ function\ ?$

$Does\ the\ set\ of\ ordered\ pairs\ \left\{(-\pi,-2),(-\frac{\pi}{2},0),(0,2),(\frac{\pi}{2},0)\right\}\exp resses\ a\ \cos ine\ function\ ?$

Identify cosine function from set of ordered pairs: 

$(0,1),(\frac{\pi}{2}و\ \frac{1}{\sqrt{2}}),(2\pi,-1).$

Identify cosine function from set of ordered pairs: 

$(0,1),(\frac{\pi}{2},-1),(2\pi,1).$

Identify cosine function from set of ordered pairs:

$\left(0,1\right),\left(\frac{\pi}{3},\ \frac{\sqrt{3}}{2}\right)\ ,\ \left(\frac{\pi}{2}\ ,\ \frac{1}{\sqrt{2}}\right)$

Identify cosine function from set of ordered pairs: $\left(0,1\right),\left(\frac{\pi}{18},\ \frac{\sqrt{3}}{2}\right)\ ,\ \left(\frac{\pi}{12}\ ,\ \frac{1}{\sqrt{2}}\right)$

Identify cosine function from set of ordered pairs: 

$(0,1),(\frac{\pi}{12},\frac{1}{\sqrt{2}}),(\frac{\pi}{3},-1)$