Trigonometry Examples

$\cos (30^{+})$

Step 1

Since $30^{+}$ is not an angle where the values of the six trigonometric functions are known, try using the sum or difference formula.

$30^{+}$ is not an exact angle

Step 2

First, split the angle into two angles where the values of the six trigonometric functions are known. In this case, $30^{+}$ can be split into $60$ .

$\cos (60)$

Step 3

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

$\frac{1}{2}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$\frac{1}{2}$

Decimal Form:

$0.5$