Question 857162
Find the exact value of each expression
a) sinπ/4 =√2/2 (reference angle of π/4 in quadrant I)
b) sin3π/4=√2/2 (reference angle of π/4 in quadrant II)
c) sin5π/4=-√2/2 (reference angle of π/4 in quadrant III)
d) sin2π/3=√3/2  (reference angle of π/3 in quadrant II)