Integration Problem -Last one
Volume by cross sections
A circular cylinder of radius r and height h whose curved surface is at an angle of pi/4 to the base (picture attached)

Question

precal · Answer

attachment

precal · Answer

I guess I am using 
$$\pi r^2$$
not sure what r is?

amistre64 · Answer

r and h are kept generic in this case

precal · Answer

Maybe I need to use the volume of a cylinder
B times height
B is a circle
$$\pi r^2 h$$

amistre64 · Answer

the area of a quadralteral is the determinant of its vectors

precal · Answer

but I am not sure I can use vectors.  ie professor did not cover vectors at all.

amistre64 · Answer

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