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Question: solving multivariate functions who migth be a partial-something

Question:solving multivariate functions who migth be a partial-something

OrbitA 55 Maple
derivative syntax differentiation
September 14 2020
1

hello how do i solve these equations and what type exactly are they ? so i can find more information

(i dont understand if this is a partial-something)

for the following function

f(y,z)=y*sin(z) + 2*cos(y)

i need to evaluate it at the following point

fy(pi/2,pi)  and  fz(pi/2,pi)

this is the part i dont understand how to do, i keep getting 0 in the equation.

 

thanks for you! and your time
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