Solve the trigonometric equation
3-3cosx=2 sin^2 x

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle