find the coordinates of the terminal point on the unit circle determined by t=9pt/7 to two decimal places

Answer 1

what does
t=9pt/7
mean?

We need an angle counterclockwise from the x axis in radians or degrees.

Answer 2

I think she means 9pi/7

x = cos(9pi/7) = -0.62
y = sin(9pi/7) = -0.78

so, the point is (-0.62,-0.78)