Question

Drag point P around the unit circle to find the values of the trigonometric functions.

sin(90°) = 1

cos(180°) = -1

sin(40°) = .643

cos(245°) = -.423

Answer 1

See the attachment

Explanation:

A unit circle is one whose radius is 1

sin(90) will have coordinates (0,1)

sin(40)= 0.643

sin(40)= P/H= 0.643/1

cos(40)= B/H= 0.766

Similarly for cos(245)= cos(-65)= -0.423/1

sin(245)= sin(-65)= -0.906