What do you need to assume about the flagpole and the shadow to solve these problems? Commons core algebra 2

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.

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.