For which value of sin = -1?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2