A point lies on the unit circle with –coordinate

MATHEMATICS · Subjective · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

A point

R

lies on the unit circle with

x

–coordinate

-\dfrac{3}{5}

. The point is located in the second quadrant. (i) Find the exact

y

–coordinate of

R

. (ii) Determine the principal value of the angle (in degrees) whose terminal side passes through

R

. (iii) Write the general solution in radians for all angles, positive and negative, whose terminal side passes through

R