Examples

\tan (x)

$\tan (x)$ ,

x = - π

$x = - π$

Step 1

Replace the variable

x

$x$ with

- π

$- π$ in the expression.

\tan (- π)

$\tan (- π)$

Step 2

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because tangent is negative in the second quadrant.

- \tan (0)

$- \tan (0)$

Step 3

The exact value of

\tan (0)

$\tan (0)$ is

0

$0$ .

- 0

$- 0$

Step 4

Multiply

- 1

$- 1$ by

0

$0$ .

0

$0$

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