Question 1: Find the distance between the points:
(i)A (9, 3) and B (15, 11)
(ii)A (7, -4) and B (-5, 1)
(iii)A (-6, -4) and B (9, -12)
(iv)A (1, -3) and B (4, -6)
(v)P (a + b, a – b) and Q (a – b, a + b)
(vi)P (a sin α, a cos α) and Q (a cos α, -a sin α)