find dy/dx ofy=tan-1(xsina/1-xcosa) Share with your friends Share 1 Manbar Singh answered this We have,y = tan-1x sin a1 - x cos a⇒dydx = 11 + x2sin2a1-x cos a2 × ddxx sin a1 - x cos a⇒dydx = 1 - x cos a21 + x2 cos2a - 2x cos a + x2sin2a × 1 - x cos a×sin a - x sin a×- cos a1 - x cos a2⇒dydx = 1 - x cos a21 + x2 - 2 x cos a × sin a - x cos a . sin a + x sin a . cos a1 - x cos a2⇒dydx = sin a1 + x2 - 2 x cos a -10 View Full Answer