CW Exact Value of Trig Function

-\frac{1}{2}

\frac{1}{2}

-\frac{\sqrt{3}}{3}

The reference angle is the acute angle formed by the terminal side of an angle in standard position and the x-axis.

The sine function, sin(θ), is the ratio of the length of the opposite side to the hypotenuse in a right triangle.

The cosine function, cos(θ), is the ratio of the length of the adjacent side to the hypotenuse in a right triangle.

The tangent function, tan(θ), is the ratio of the sine and cosine functions: tan(θ) = sin(θ)/cos(θ).

Subtract 2π until the angle is within the range [0, 2π].

\frac{1}{2}

\frac{1}{2}