Precalculus Examples

$\cos (\frac{π}{6}) = x$

Step 1

Rewrite the equation as $x = \cos (\frac{π}{6})$ .

$x = \cos (\frac{π}{6})$

Step 2

The exact value of $\cos (\frac{π}{6})$ is $\frac{\sqrt{3}}{2}$ .

$x = \frac{\sqrt{3}}{2}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$x = \frac{\sqrt{3}}{2}$

Decimal Form:

$x = 0.86602540 \dots$