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The derivative of a function multiplied by a constant is equal to the constant times the derivative of the function
Learn how to solve differential calculus problems step by step online.
$-\frac{d}{dx}\left(x\cos\left(x\right)\right)$
Learn how to solve differential calculus problems step by step online. Find the derivative of -xcos(x). The derivative of a function multiplied by a constant is equal to the constant times the derivative of the function. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g', where f=x and g=\cos\left(x\right). The derivative of the linear function is equal to 1. The derivative of the cosine of a function is equal to minus the sine of the function times the derivative of the function, in other words, if f(x) = \cos(x), then f'(x) = -\sin(x)\cdot D_x(x).