Question

Positive angles located in the fourth quadrant may be described as___.

1. 0≤Ф≤90
2. 180≤Ф≤270
3. 90≤Ф≤180
4. 270≤Ф≤360

Answer 1

Positive angles located in the fourth quadrant may be described as 270≤Ф≤360 .

The option is

4. 270≤Ф≤360

Explanation:

When the terminal arm of an angle starts from the x-axis in the anticlockwise direction then the angles are always positive angles.

For Example.

Quadrant I - 0 to 90°

Quadrant II - 90° to 180°

Quadrant III - 180° to 270°

Quadrant IV - 270° to 360° ( 4. 270≤Ф≤360 )

Hence,Positive angles located in the fourth quadrant may be described as 270≤Ф≤360 .

When the terminal arm of an angle starts from the x-axis in the clockwise direction than the angles are negative angles.

Quadrant IV - 0° to -90°

Quadrant III - - 90° to -180°

Quadrant II - -180° to -270°

Quadrant I - -270° to -360°