Pwease help this is very important I will give you brain thing if its correct ♡

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.

Question b of 10which of the following describe an angle with a vertex at a? check all that applyo a. labcов. савd dooo c_baco d. zacb

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?