Trigonometry Examples

$\arcsin (165)$

Step 1

Since $165$ is not an angle where the values of the six trigonometric functions are known, try using the sum or difference formula.

$165$ 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, $165$ can be split into $120 + 45$ .

$\arcsin (120 + 45)$

Step 3

Add $120$ and $45$ .

$\arcsin (165)$