Please help! This is the last question to my test!! Will give brainliest!

What is the length of the unknown leg in the right triangle ?

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?