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

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?

What is the slope of the line (-7,2) (4,6)