What is the derivative of cos((pix)/4) ?

The derivative of cos((pix)/4) is -sin((pix)/4) pi/4

What is the first derivative of cos((pix)/4) ?

The first derivative of cos((pix)/4) is -sin((pix)/4) pi/4

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derivative of

cos (\frac{π x}{4})

- sin (\frac{π x}{4}) \frac{π}{4}

Solution steps

\frac{d}{d x} (cos (\frac{π x}{4}))

Apply the chain rule:

- sin (\frac{π x}{4}) \frac{d}{d x} (\frac{π x}{4})

= - sin (\frac{π x}{4}) \frac{d}{d x} (\frac{π x}{4})

\frac{d}{d x} (\frac{π x}{4}) = \frac{π}{4}

= - sin (\frac{π x}{4}) \frac{π}{4}

\frac{d}{d x} (ln ((x - 1)^{2}))

x = 3 y, x = y^{2} - 4

\int x^{2} e^{- λ x} d x

\int_{0}^{1} \frac{3}{1 + t ^{2}} d t

\frac{d}{d θ} (3 - sin (θ))

What is the derivative of cos((pix)/4) ?
The derivative of cos((pix)/4) is -sin((pix)/4) pi/4
What is the first derivative of cos((pix)/4) ?
The first derivative of cos((pix)/4) is -sin((pix)/4) pi/4