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Identify cosine function from set of ordered pairs

Identify cosine function from set of ordered pairs: 

(0,1),(π,12),(3π2,0)(0,1),(\pi,\frac{1}{2}),(\frac{3\pi}{2},0)

Identify cosine function from set of ordered pairs: 

(0,1),(π4و12),(π,1)(0,1),(\frac{\pi}{4}و\frac{1}{\sqrt{2}}),(\pi,-1)

Identify cosine function from set of ordered pairs:

(0,1),(π3,12),(π2,0).(0,1),(\frac{\pi}{3},\frac{1}{2}),(\frac{\pi}{2},0).

Does the set of ordered pairs {(3π,0),(2π,2),(π,0),(0,2)}expresses a cosine function ?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 {(π,2),(π2,0),(0,2),(π2,0)}expresses a cosine 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),(π2و 12),(2π,1).(0,1),(\frac{\pi}{2}و\ \frac{1}{\sqrt{2}}),(2\pi,-1).

Identify cosine function from set of ordered pairs: 

(0,1),(π2,1),(2π,1).(0,1),(\frac{\pi}{2},-1),(2\pi,1).

Identify cosine function from set of ordered pairs:

(0,1),(π3, 32) , (π2 , 12)\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: (0,1),(π18, 32) , (π12 , 12)\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),(π12,12),(π3,1)(0,1),(\frac{\pi}{12},\frac{1}{\sqrt{2}}),(\frac{\pi}{3},-1)