What is the domain of #f(x) = sqrt(cosx)#?
1 Answer
Feb 11, 2018
The domain is
Explanation:
We have
#f(x) = sqrt(cosx)#
We know that
Thus, we need
#cosx ≥ 0#
We solve this inequality by converting it into an equation then using test points.
#cosx = 0#
#x = pi/2, (3pi)/2, ...#
Now if we test
However, when
Hopefully this helps!