Question 857587
Find the exact value of each expression
a) sin 8π/3=-1 (reference angle=2π/3)
b) cos 8π/3=0  (reference angle=2π/3)
c) sin 11π/4=√2/2  (reference angle=3π/4) in quadrant II
d) cos 11π/4=-√2/2 (reference angle=3π/4) in quadrant II