Graph Using a Table of Values y=cos(x)

$y = \cos (x)$

Substitute $- 2$ for $x$ and find the result for $y$ .

$y = \cos (- 2)$

Solve the equation for $y$ .

Remove parentheses.

$y = \cos (- 2)$

Evaluate $\cos (- 2)$ .

$y = 0.99939082$

Substitute $- 1$ for $x$ and find the result for $y$ .

$y = \cos (- 1)$

Solve the equation for $y$ .

Remove parentheses.

$y = \cos (- 1)$

Evaluate $\cos (- 1)$ .

$y = 0.99984769$

Substitute $0$ for $x$ and find the result for $y$ .

$y = \cos (0)$

Solve the equation for $y$ .

Remove parentheses.

$y = \cos (0)$

The exact value of $\cos (0)$ is $1$ .

$y = 1$

Substitute $1$ for $x$ and find the result for $y$ .

$y = \cos (1)$

Solve the equation for $y$ .

Remove parentheses.

$y = \cos (1)$

Evaluate $\cos (1)$ .

$y = 0.99984769$

Substitute $2$ for $x$ and find the result for $y$ .

$y = \cos (2)$

Solve the equation for $y$ .

Remove parentheses.

$y = \cos (2)$

Evaluate $\cos (2)$ .

$y = 0.99939082$

This is a table of possible values to use when graphing the equation.

$\begin{array}{c} x & y \\ - 2 & 0.99939082 \\ - 1 & 0.99984769 \\ 0 & 1 \\ 1 & 0.99984769 \\ 2 & 0.99939082 \end{array}$