Give two positive and two negative angles that are coterminal with the given quadrantal angle. 0°

Key Concepts

Coterminal Angles

Coterminal angles are angles that share the same terminal side when drawn in standard position. To find coterminal angles, you can add or subtract multiples of 360° (for degrees) or 2π (for radians) to the given angle. For example, if you start with an angle of 0°, adding 360° gives you another coterminal angle of 360°, while subtracting 360° results in -360°.

Quadrantal Angles

Quadrantal angles are angles that lie on the axes of the coordinate plane, specifically at 0°, 90°, 180°, and 270° (or their equivalents in radians). These angles are significant in trigonometry because their sine and cosine values are well-defined and often used as reference points. The angle 0° is a quadrantal angle, making it a key reference for finding coterminal angles.

Positive and Negative Angles

Positive angles are measured counterclockwise from the positive x-axis, while negative angles are measured clockwise. In the context of coterminal angles, both positive and negative angles can be derived from a given angle by adding or subtracting full rotations (360°). For instance, from 0°, you can find positive angles like 360° and negative angles like -360°.