Let the area of the region enclosed by the curve y=min{sinx,cosx} and the x -axis between x=−π to x=π be A . Then A2 is equal to ______ .
Answer: 16
Solution
Between −π and π, y=min{sinx,cosx} encloses (with the x-axis) a region of total area A=4 (two congruent pieces of area 2 each, from the standard ∫ of the lower envelope). Hence A2=16.