I need help, i am terrible at math, plz help me

Triangle xyz has vertices x(1,3), y(0,0)

In angle pqr find the measure of

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january. what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed. use 3.14 for π .