The –coordinate of a point on the unit circle is and the corresponding angle lies in…

MATHEMATICS · Single correct · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

The

y

–coordinate of a point on the unit circle is

-\dfrac{5}{13}

and the corresponding angle

\theta

lies in Quadrant IV. Determine

\cos \theta

. (a)

-\dfrac{12}{13}

(b)

\dfrac{11}{13}

(c)

\dfrac{12}{13}

(d)

-\dfrac{5}{13}