Question

Evaluate
a) sin (4pi/3)
b) cos (5pi/6)

Answer 1

sin(4π/3)= -√3/2
cos(5π/6)= -√3/2

Answer 2

The correct answers are:

a) sin (4π/3) =
`- ( √(3) )/(2)`
b) cos (5π/6) =
`- ( √(3) )/(2)`

I hope this helps.