Trigonometric Function

A = adjacent to the angleO = opposite to the angleH = hypotenuse

Cosine (Cos)

cosx = a/h

Domain : All Real

Range [-1,1]

Odd

sinx = o/h

Domain: All Real

Range : [-1,1]

Even

tan x = o/a

Domain : All Real except where cosx=0

Range: All Real

Odd

secx = h/a

Domain : All x's except where cosx = 0

Range: Both when y is less than or equal to 1 and greater than or equal to 1

Even

cscx = h/a

Domain: All x's except sinx=0

Range: Both when y is less than or equal to 1 and greater than or equal to 1

Odd

cotx = a/o

Domain: All x's except tanx=0

Range: All reals

odd