Given that log 8=0.931,log9=0.9542.fimd the value of log60

Evaluate the following expression 1/3^2

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

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.