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If f(x) = cos x cos 2x cos 4x cos 8x cos...

If `f(x) = cos x cos 2x cos 4x cos 8x cos 16x` then find `f' (pi/4)`

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To find \( f'(\frac{\pi}{4}) \) for the function \( f(x) = \cos x \cos 2x \cos 4x \cos 8x \cos 16x \), we can follow these steps: ### Step 1: Rewrite the function We start with the function: \[ f(x) = \cos x \cos 2x \cos 4x \cos 8x \cos 16x \] To simplify this, we can multiply and divide by \( 2 \sin x \): ...
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