What is the derivative of cos(θx) ?

The derivative of cos(θx) is cos(θ)

What is the first derivative of cos(θx) ?

The first derivative of cos(θx) is cos(θ)

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\frac{d}{d x} (cos (θ) x)

cos (θ)

Solution steps

\frac{d}{d x} (cos (θ) x)

Treat

θ

as a constant

Take the constant out:

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

= cos (θ) \frac{d x}{d x}

Apply the common derivative:

\frac{d x}{d x} = 1

= cos (θ) \cdot 1

Simplify

= cos (θ)

What is the derivative of cos(θx) ?
The derivative of cos(θx) is cos(θ)
What is the first derivative of cos(θx) ?
The first derivative of cos(θx) is cos(θ)