Determine the coordinates of the point on the unit circle corresponding to the given central angle.

21 degrees

a: (0.36, 0.93)
b: (0.93, 0)
c: (0.93, 0.36)
d: (1, 0.36

Option C.  (0.93,0.36)

Step-by-step explanation:

we know that

The coordinates (x,y) of a point of the unit circle are given by the formula

Remember that r is the radius of circle and the unit circle has r=1 unit

so

For

substitute

therefore

The coordinates of the point are (0.93,0.36)

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

i do not know the answer

step-by-step explanation: