HELP ME HURRY PLEASE I NEED YOU

The graph below could be the graph of which exponential function?

If value of cos330° is √3/2 then find tan165°.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?