Question Number 46568 by scientist last updated on 28/Oct/18
$${show}\:{that}\:{if}\:{the}\:{side}\:{of}\:{a}\:{triangle}\:{are}\:{in}\:{A}.{P}, \\ $$$${then}\:{the}\:{cotangent}\:{also}\:{in}\:{A}.{P} \\ $$
show-that-if-the-side-of-a-triangle-are-in-A-P-then-the-cotangent-also-in-A-P-