Question

What is the exact value of tan 157.5 degrees?

Answer 1

To know the exact value of  tan(157.5°), you only have to enter the value in your calculator:

 First, press the buttton identified as "tan" and then write 157.5. The next step you must follow is press the button with the symbol of equal: "="

 Now, the value of tan(157.5°) will appear on the screen of you calculator.

 As you can see, the exact value of tan(157.5°) is:

 tan(157.5°)=-0.4142