Volume = 54π units³
Work is attached in the image provided.
<span>They both forget about which way is North, and the needles point at each other.</span>
Expand and simplify LHS - Apply identity sin^2x+cos^2x = 1 To verify: (cotx<span> - </span>cscx)(cosx+1) =-sinx LHS=(cosx/sinx - 1/sinx)(cosx<span>+1)</span>