if y=Cos-1[3x + (4root(1-x2))/5] find dy/dx Share with your friends Share 2 Ajanta Trivedi answered this Let y = cos-13x + 41-x25⇒y =cos-135.x + 45.1-x2put cos α = 35 , cos β = xnow, sin α = 1-cos2α =1-925=45sin β = 1-cos2β = 1-x2 y = cos-1cos α . cos β + sin α . sin β⇒y = cos-1cosα-β⇒y = α - β⇒y = cos-135 - cos-1x⇒dydx = 0 - -11-x2 = 11-x2 -5 View Full Answer
