Question 698021
Given tanx= 3/4, find cot(x-pi/2).
tan^-1(3/4)≈0.64350=x
(x-&#960;/2)&#8776;-0.9273 (in quadrant IV where cos and tan<0)
cot(x-&#960;/2)=cot(-0.9273)=1/tan(-0.9273)&#8776;-0.75