New kid on the Block
arey rite cos x in terms of tan x/2 .nd relace by it nd we know differenciation of tanx/2 will come in terms of sec2(x/2)
wich is 1 + tan2(x/2)
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
2
