Circular Functions: pi - x

Question

If on C the distance from P(1, 0) to the point T is x, determine the coordinates of the point T' if T(3/5, 4/5) and T' is pi - x.

Answer 1

If C is the unit circle, then T = (cosx, sinx) = (3/5, 4/5).

I am guessing that you mean that T' = (cos(π-x) , sin(π-x)) = (-cosx, sinx) = (-3/5, 4/5)