Trigonometry Chapter 1 part b

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.
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Terms in this set (...)

sin a
y/r
cos a
x/r
tan a
y/x
cot a
x/y
sec a
r/x
csc a
r/y