Differentiate each of the following w.r.t. x:
cot3 Formulae : • • Let, y = cot3 x2 and u = x2 therefore, y= cot3 u let, v = cot u therefore, y= v3 Differentiating above equation w.r.t. x,
………… By chain rule
…………. 
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Differentiate each of the following w.r.t. x:
cot3 Formulae : • • Let, y = cot3 x2 and u = x2 therefore, y= cot3 u let, v = cot u therefore, y= v3 Differentiating above equation w.r.t. x,………… By chain rule ………….