lim-x-pi-4-sin-9-x-1-2-cos-7-x-4x-pi-

Question Number 197054 by cortano12 last updated on 07/Sep/23

\lim_{x \to \frac{π}{4}} \frac{\sin^{9} x - \frac{1}{2} \cos^{7} x}{4 x - π} = ?

Answered by universe last updated on 07/Sep/23

\frac{1}{4 \sqrt{2}}

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