Trigonometry Examples

$\tan (x)$ , $x = - π$

Step 1

Replace the variable $x$ with $- π$ in the expression.

$\tan (- π)$

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.

$- \tan (0)$

Step 3

The exact value of $\tan (0)$ is $0$ .

$- 0$

Step 4

Multiply $- 1$ by $0$ .

$0$

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