Assertion: basic trigonometric function | /r/HasProperty | defined using circle
Facets:
value: with equation
type: OTHER
Source sentences:
text: The six basic trigonometric functions may be defined using a circle with equation x 2 + y 2 = r 2 and the angle θ in standard position with its vertex at the center of the circle and its initial side along the positive portion of the x‐axis (see Figure ).