Precalculus Examples

$\cos (60) \cos (10) - 60 \sin (10)$

Step 1

The exact value of $\cos (60)$ is $\frac{1}{2}$ .

$\frac{1}{2} \cos (10) - 60 \sin (10)$

Step 2

Combine $\frac{1}{2}$ and $\cos (10)$ .

$\frac{\cos (10)}{2} - 60 \sin (10)$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{\cos (10)}{2} - 60 \sin (10)$

Decimal Form:

$- 9.92648678 \dots$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$