Question Number 197054 by cortano12 last updated on 07/Sep/23
$$\:\:\:\:\:\:\underset{{x}\rightarrow\frac{\pi}{\mathrm{4}}} {\mathrm{lim}}\:\frac{\mathrm{sin}\:^{\mathrm{9}} \mathrm{x}−\frac{\mathrm{1}}{\mathrm{2}}\:\mathrm{cos}\:^{\mathrm{7}} \mathrm{x}}{\mathrm{4x}−\pi}\:=? \\ $$
Answered by universe last updated on 07/Sep/23
$$\frac{\mathrm{1}}{\mathrm{4}\sqrt{\mathrm{2}}} \\ $$