given that a,b,c,k are positive real numbers ; x,y,z are variable quantities satisfying acos x+bcosy+ccosz=k.find the minimum values of 1)cos2x+cos2y+cos2z2)acos2x+bcos2y+ccos2z
given that a,b,c,k are positive real numbers ; x,y,z are variable quantities satisfying acos x+bcosy+ccosz=k.find the minimum values of
1)cos2x+cos2y+cos2z
2)acos2x+bcos2y+ccos2z