For each angle listed in the table below select the letter o

For each angle listed in the table below, select the letter of the corresponding point on the unit circle, the value of the x-coordinate of the point, and the value of the x-coordinate of the point Round the coordinates of the point to 3 decimal places. Don\'t enter sin or cos. (You must approximate your answers.)

Solution

-400 deg ( -360 - 40 = -40 deg in IVrt quad) : x = cos(-40) = 0.766 ; y = sin(-40) = -0.643 ---- F

150 deg ( IInd quadrant ) : x = cos150 = -0.866 ; y = sin150 = 0.500 ---- C

250 deg ( IIIrd quadrant) : x = cos250 = - 0.342 ; y = sin250 = -0.939 ---- E

800 deg (= 80 deg in Ist quadrant) ; x = cos800 = 0.174 ; y = sin800 =0.984 ------ A

-150 deg ( = 210 deg in IIIrd quadrant) ; x = cos(-150) = -0.866 ; y = sin(-150) = -0.5 ----- D