What is (\partial)/(\partial x)(cos(y)cos(x)) ?

The answer to (\partial)/(\partial x)(cos(y)cos(x)) is -cos(y)sin(x)

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(\partial)/(\partial x)(cos(y)cos(x))

\frac{\partial}{\partial x} (cos (y) cos (x))

- cos (y) sin (x)

Solution steps

\frac{\partial}{\partial x} (cos (y) cos (x))

Treat

y

as a constant

Take the constant out:

(a \cdot f)^{'} = a \cdot f^{'}

= cos (y) \frac{\partial}{\partial x} (cos (x))

Apply the common derivative:

\frac{\partial}{\partial x} (cos (x)) = - sin (x)

= cos (y) (- sin (x))

Simplify

= - cos (y) sin (x)

What is (\partial)/(\partial x)(cos(y)cos(x)) ?
The answer to (\partial)/(\partial x)(cos(y)cos(x)) is -cos(y)sin(x)