Find the reference number for each value of t t 4pi3 t5pi3

Find the reference number for each value of t

t = 4pi/3

t=5pi/3

t= -7pi/6

t=3.7

Find the terminal point P(x, y) on the unit circle determined by the given value of t.

t = 6

Solution

x=rcos(t) , y =rsin(t)
r=1(because unit circle)
x=1cos(2pi) => x=1
y=1sin(2pi) => y=0
So P(x,y)=(1,0)