Let P(x,y) be the terminal point on the unit circle determined by t. Then:

a) sin(t)=x, cos(t)=y, tan(t)=x/y
​b) sin(t)=y, cos(t)=x, tan(t)=x/y
​c) sin(t)=x, cos(t)=y, tan(t)=y/x
d) sin(t)=y, cos(t)=x, tan(t)=y/x