Unit circle and sine/cosine curve

In the beginning remind the definition of sine and cosine functions. A point E on unit circle have coordinates (_________, __________) where is an angle defined by that point.

Let t be an arbitrary real number. T=E(t) corresponds to it on the number circle. The cosine value is ______________ coordinate, and the sine value is ___________________ for the point T = E(t). (select true answer)