# On the unit circle, the point P(-5/13, 12/13) lies on the terminal arm of an angle in standard position?

##### 2 Answers

The angle is

(assuming that is what the question intended to ask).

#### Explanation:

In standard position with the unit length terminal arm at

implies

which, in turn, implies

which can be solved using a calculator to obtain the result above.

I have no one sentence answer. See below.

#### Explanation:

If the question was to find the values of the six trigonometric functions, use the definition. Note that

(The point P is on the unit circle.)

Call the angle