Solve tan2x + 2sinx=0 for 0-360

Can someone me with my hwplz(only the circled ones)

Little’s law firm has just one lawyer. customers arrive randomly at an average rate of 6 per 8 hour workday. service times have a mean of 50 minutes and a standard deviation of 20 minutes. how long does a customer spend at little’s law firm on average?

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?