Question

square root 2 = 2cosx

Answer 1

45 degree

Answer 2

\[\sqrt{2}\]/2 = cosx
x=cos\[\cos^{-1} (\sqrt{2}/2)\]
x=45

Answer 3

cosx = square root 2 / 2
x = arc cos(square root 2 / 2)

Answer 4

Thank you