Differentiation Using the Chain Rule | NCERT Class 12 Mathematics Quick Facts dydx=dydu⋅dudx\frac{dy}{dx}=\frac{dy}{du}\cdot\frac{du}{dx} ddx(sinx)=cosx\frac{d}{dx}(\sin x)=\cos xddx(cosx)=−sinx\frac{d}{dx}(\cos x)=-\sin xddx(tanx)=sec2x\frac{d}{dx}(\tan x)=\sec^2xddx(cotx)=−csc2x\frac{d}{dx}(\cot x)=-\csc^2xddx(secx)=secxtanx\frac{d}{dx}(\sec x)=\sec x\tan xddx(xn)=nxn−1\frac{d}{dx}(x^n)=nx^{n-1} Story Imagine…

