if y=tan x then prove that y2=2yy1 Share with your friends Share 1 Ajinder Singh answered this y=tanxy1= sec2 xy2= 2 secx d/dx (secx) = 2 sec2 x tanx y2 = 2 y y1 8 View Full Answer Ritik Asati answered this X is equal to at square and y=2at then find the value of dy/dx 0
