- #1

unf0r5ak3n

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## Homework Statement

let f(x) = sqrt(1-sin(x))

## Homework Equations

What is the domain of f?

What is the domain of f'(x)?

## The Attempt at a Solution

I understand that the domain of f is all real numbers not including every increment of 90 degrees, but I am not sure how to state that.

I also found that f'(x) = (1/2 -sin(x))(-cos(x)) I am not sure if that's correct though