Expression 2: 0 less than or equal to "y" less than or equal to arc cosine left parenthesis, StartFraction, cos "x" Over 1 plus 2cos "x" , EndFraction , right parenthesis StartFraction, StartRoot, left parenthesis, StartNestedFraction, pi NestedOver 2 , EndNestedFraction minus "x" , right parenthesis left parenthesis, "x" , right parenthesis , EndRoot Over StartRoot, left parenthesis, StartNestedFraction, pi NestedOver 2 , EndNestedFraction minus "x" , right parenthesis left parenthesis, "x" , right parenthesis , EndRoot , EndFraction0≤y≤arccoscosx1+2cosxπ2−xxπ2−xx
2
Expression 3: "I" equals Start integral from 0 to StartFraction, pi Over 2 , EndFraction , end integral, arc cosine left parenthesis, StartFraction, cos "x" Over 1 plus 2cos "x" , EndFraction , right parenthesis "d" "x"I=∫π20arccoscosx1+2cosxdx
equals=
2.0 5 6 1 6 7 5 8 3 5 62.05616758356
3
Expression 4: StartFraction, 5 pi squared Over 24 , EndFraction5π224