Tiêu đề Chapter 07.pdf ✅

* costu + cosly = cost (xy-Xc](1-y) cosu-cos'y = cos(4y +NY(1 - y )) * Itan' x = tant = sin" = cos 1 +x * bosinix = Sin" (bx-443) 3 cosx = cost (44"- 3x) 3 start = tant e * fanis + fant y + fan z = famil 4ty+ z + xyz I -xy - yzzx * Sin + cos = E * fan + co+"x= * See + coseix = E -> Sino = Sinx 256 . 0 :ni + ED"x in t -> coso = cost Ets, 0 = 2u5 IX int -> fano = tanx It, 0= ni +X : nt