# Question #af849

##### 2 Answers

#### Explanation:

First, mark the point

You need to subtract

The answer already given is perfectly alright.

#### Explanation:

Just to make it more clear, it can be stated that argument is measured in anticlockwise direction from positive x axis and it is positive till it is less than 180 degrees. In this case the angle that vector -3-7i makes with x axis is in the third quadrant, hence more than 180 degrees. In this case the angle is measured in clockwise direction , hence it is -1.976 radians.