Derivatives by formula - other trignometric
Derivatives by formula - other trignometric
Last updated at April 16, 2024 by Teachoo
Misc 28 Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): đĽ/(1 + đĄđđâĄđĽ ) Let f (x) = đĽ/(1 + đĄđđâĄđĽ ) Let u = x & v = 1 + tan x So, f(x) = đ˘/đŁ â´ fâ(x) = (đ˘/đŁ)^ⲠUsing quotient rule fâ(x) = (đ˘^ⲠđŁ âă đŁă^Ⲡđ˘)/đŁ^2 Finding uâ & vâ u = x uâ = 1 & v = 1 + tan x vâ = (1 + tan x)â = 0 + sec2 x = sec2 x Now, fâ(x) = (đ˘/đŁ)^Ⲡ= (đ˘^ⲠđŁ âă đŁă^Ⲡđ˘)/đŁ^2 = (1(1 +ă tanăâĄăđĽ)ă â đ đđ2 đĽ (đĽ))/ă(1 +ă tanăâĄăđĽ)ăă^2 = (đ +ă đđđăâĄăđ â đ đđđđ đă)/ă(đ +ă đđđăâĄăđ)ăă^đ = (đ˘^ⲠđŁ âă đŁă^Ⲡđ˘)/đŁ^2 = (1(1 +ă tanăâĄăđĽ)ă â đ đđ2 đĽ (đĽ))/ă(1 +ă tanăâĄăđĽ)ăă^2 = (đ +ă đđđăâĄăđ â đ đđđđ đă)/ă(đ +ă đđđăâĄăđ)ăă^đ