SOLUTION: Using a calculator, find the value of cot (-414 degrees) to four decimal places. a.-0.7265 b.-9.5143 c.-1.3764 d.-2.2460

Use the fact that 

First find , then find its reciprocal.

You can find this easily



Then you can either use the reciprocal key, or else 



to get  which rounds off to choice a.

Edwin