For the acute angles in a right triangle, sin(5x)° = cos(3x + 10)°. What is the number of degrees in the measure of the smaller angle?

Could somebody me with this radical simplification?

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation

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