Differentiate each of the following w.r.t. x:
cos 5x
Formulae :
• 
• 
Let,
y = cos 5x
and u = 5x
therefore, y= cos u
Differentiating above equation w.r.t. x,
………… By chain rule
…………. 
= - sin 5x . 5
= - 5 sin 5x
1
Differentiate each of the following w.r.t. x:
cos 5x
Formulae :
•
•
Let,
y = cos 5x
and u = 5x
therefore, y= cos u
Differentiating above equation w.r.t. x,
………… By chain rule
………….
= - sin 5x . 5
= - 5 sin 5x