6 terms

If a is an angle in standard position, and the point (x,y) is any point on the terminal side of a other that the origin, the the six trigonometric functions of angle a is as follows. x = leg on x-axis, y = vertical leg, r = hypotenuse.

sin a

y/r

cos a

x/r

tan a

y/x

cot a

x/y

sec a

r/x

csc a

r/y