Differentiate each of the following w.r.t. x:


Formulae :


• 1 – sin2x = cos2x


•


•


Let,



Multiplying numerator and denominator by (1+sin x),




……………. (1 – sin2x = cos2x)




y = sec x + tan x


Differentiating above equation w.r.t. x,




………….



1