How do you find all six trigonometric functions of (5pi)/6?

1 Answer
May 22, 2015

On the trig unit circle:

sin ((5pi)/6) = sin (pi - pi/6) = sin (pi/6) = 1/2

cos ((5pi)/6) = cos (pi - pi/6) = -cos (pi/6) = (-sqrt3)/2

tan ((5pi)/6) = 1/(-sqrt3) = (-sqrt3)/3

cot ((5pi)/6) = 1/tan ((5pi)/6) =

sec = 1/cos ((5pi)/6)

csc = 1/sin ((5pi)/6) =