Question

The angle 180 degrees has only 4 functions, what are their values?

Answer 1

Look for functions that do not have zero in the denominator.

Explanation:

`sin(180) = 0`
`cos(180) =-1`
`tan(180) = sin(180)/cos(180)=0`
`sec(180)=1/cos(180)=-1`

The other two functions csc(180) and cot(180) are undefined because of zero in the denominator.

Hope that helped