Is the equation of ellipse a function?

Provide an example of a trigonometric function and describe how it is transformed from the standard trigonometric function f(x) = sin x, f(x) = cos x, or f(x) tan x using key features.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.