Ayuden por favor doy coronita​

Evaluate cos2θ for cosθ = square root of 3/2

Graph a triangle (xyz) and reflect it over the line y=x to create triangle x’y’z’. describe the transformation using words. draw a line segment from point x to the reflecting line, and then draw a line segment from point x’ to the reflecting line. what do you notice about the two line segments you drew? do you think you would see the same characteristics if you drew the line segment connecting y with the reflecting line and then y’ with the reflecting line? how do you know?

If jobs arrive every 15 seconds on average, what is the probability of waiting more than 30 seconds?