prove that sec4x-1/sec2x-1=tan4x/tan2x. Share with your friends Share 2 Vipin Verma answered this LHS = sec4x -1sec2x-1 =(1-cos4x)cos2x(1-cos2x)cos4x= 2sin22x.cos2x2sin2x .cos4xRHS = tan4xtan2x =sin4x.cos2xcos4x.sin2xequating LHS = RHS , we have2sin22x.cos2x2sin2x .cos4x =sin4x.cos2xcos4x.sin2xOr sin22xsin2x =sin4xsin2xOr sin22xsin2x =2sin2xcos2x2sinxcosxsin2xsinx =cos2xcosxHence the LHS is not equal to RHS.So please check your question. -5 View Full Answer
