Trigonometry : Unit Circle

unit circle  The unit circle is a circle of radius 1 unit that is centered on the origin of the coordinate plane The unit circle is fundamentally related to concepts in How To Given a point P on the unit circle corresponding to an angle oft, t , find the sine and cosine The sine oft t is equal to the y-

The equation for the unit circle is x2+y2=1 So if we know one of the two coordinates of a point on the unit circle, we can substitute that How To: Given a point P on the unit circle corresponding to an angle of t t , find the sine and cosine The sine of t t is equal to the y-

Using the unit circle diagram, draw a line “tangent” to the unit circle where the hypotenuse contacts A unit circle is divided into four quadrants making an angle of 90°, 180°, 270°, and 360° or π2, π 3π2, and 2π respectively