Zo. om anyone? i am hella bored​

The product of two negative rational numbers is always zero sometimes zero never zero

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?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle