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QUESTION
When sinx=1, what does x equal?
If ##x## is a non-right angle in a right angled triangle then ##sin(x)## is the ratio of the length of the side opposite ##x## with the hypotenuse of the triangle
If we restrict our answer to ##x## within ##[0,2pi]## ##sin(x) = 1## only occurs when ##x=pi/2##
