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 Problem Statement
 I've submitted a similar thread previously but messed it all up so here's a second try. The objective is to find the first and second partial derivative of the function z = tan x^2*y^2
 Relevant Equations

tan x^2*y^2 = (sin x^2*y^2)/(cos x^2*y^2)
quotient rule: if z= f/g, z' = (f'*g  f*g')/g^2
I have attached a word document demonstrating the working out cos i was too lazy to learn how Latex primer works and writing it like I did above would've been too hard too read. I tried to make it as understandable as possible, presenting fractions as
' a ' instead of ' a / b ' .

b
' a ' instead of ' a / b ' .

b
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