What is the sec(inverse cos (5^0.5/2))?
1 Answer
Dec 4, 2015
Explanation:
For this problem, we just need two facts:
-
sec(x) = 1/cos(x)sec(x)=1cos(x) (by definition of the secant function) -
cos(arccos(x)) = arccos(cos(x)) = xcos(arccos(x))=arccos(cos(x))=x (by definition of the inverse of a function)
Applying those gives us