# Question #9c537

##### 1 Answer

Mar 1, 2017

#### Explanation:

Call M (2, -3), the point on the terminal arm. Consider the right triangle OMm with:

Vertical leg: mM = - 3

Horizontal leg: Om = 2

The hypotenuse

Call angle < mOM = t.

t is in Quadrant 4.

We get:

Calculator gives

Trig unit circle gives another t that has the same sine value (-0.832):

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