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f(x, y) = sin(x).cos(y) Which of the following is a critical point?

Posted: Thu Jul 14, 2022 9:29 am
by answerhappygod
a) (Π⁄4, Π⁄4)
b) (- Π⁄4, Π⁄4)
c) (0, Π⁄2)
d) (0, 0)