Precalculus Examples

$\tan (45)$

Step 1

The complement of $\tan (45)$ is the angle that when added to $\tan (45)$ forms a right angle ( $90 °$ ).

$90 ° - \tan (45)$

Step 2

Simplify each term.

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Step 2.1

The exact value of $\tan (45)$ is $1$ .

$90 - 1 \cdot 1 °$

Step 2.2

Multiply $- 1$ by $1$ .

$90 - 1 °$

Step 3

Subtract $1$ from $90$ .

$89 °$