Question

If u=f(x,y) where x=escost and y=essint, show that: ∂2u∂x2+∂2u∂y2=e−2s[∂2u∂s2+∂2u∂t2]

Answer 1

Answer:

2s[∂2u∂s2+∂2u∂t2]=22-2/4

x/y/2=xy2

=2sxy/2y

Step-by-step explanation:

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