Trigonometric Function
A = adjacent to the angle
O = opposite to the angle
H = hypotenuse
Cotangent (Cot)
odd
Range: All reals
Domain: All x's except tanx=0
cotx = a/o
Cosecant (Csc)
Domain: All x's except sinx=0
cscx = h/a
Secant (Sec(
Range: Both when y is less than or equal to 1 and greater than or equal to 1
Domain : All x's except where cosx = 0
secx = h/a
Tangent (Tan)
Range: All Real
Domain : All Real except where cosx=0
tan x = o/a
Sine (Sin)
Even
Range : [-1,1]
Domain: All Real
sinx = o/h
Cosine (Cos)
Odd
Range [-1,1]
Domain : All Real
cosx = a/h