Suggested: (cosx)y=(cosy)x - if (cosx)^y=(cosy)^x find dy/dx - cos(x+y)=cosx cosy-sinx siny - cosx+cosy= 2 cos (x+y/2)cos(x-y/2) - sinx-siny/cosx+cosy=tan x-y/2 - prove that (cosx-cosy)^2+(sinx-siny)^2=4sin^2(x-y/2) - prove that sinx-siny/cosx+cosy=tan x-y/2 - cos(x+y)=cosx cosy-sinx siny derivation - prove that cos(x+y)=cosx.cosy-sinx.siny in english - lim x tends to y cosx-cosy/x-y - cos(x+y)=cosx cosy-sinx siny in hindi - prove that cos(x+y)=cosx.cosy-sinx.siny in hindi - (y cosx+siny+y)dx+(sinx+xcosy+xdy=0 - examine for minimum and maximum values of cosx+cosy+cos(x+y) - (cosx)y=(cosy)x Browse related:
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