1. The area between the curvessinx andx, betweenx= /2 andx= , is ________?
2. The volume of revolution obtained by rotating the area between the curvessinx andxaround the y-axis,betweenx= /2 andx= , is ________?
3. The volume of revolution obtained by rotating the area between the curvessinx andxaround the line y= -1, betweenx= /2 andx= , is ________?