Find the domain of the function algebraically:

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Pls what is the relative minimum of the function? enter your answer in the box

Given a normal distribution with µ =50 and σ =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. don’t simply state the results. show graphs where necessary.