Question

integral of squreroot cosx

Answer 1

\[\int\limits_{2\pi \div3}^{3\pi \div2} \sqrt{cosx}dx\]

Answer 2

how can one define open space???

Answer 3

\(\cos(x) < 0\) for \(x\in \left[\dfrac{2\pi}{3},\dfrac{3\pi}{2}\right)\)

Your integral fails to exist in the Real Numbers.

Answer 4

http://www.wolframalpha.com/input/?i=integrate+sqrt%28cos%28x%29%29+dx+from+2pi%2F3+to+3pi%2F2