lim _{x rightarrow frac{pi}{4}} frac{4 sqrt{2 | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Let $L = \lim _{x \rightarrow \frac{\pi}{4}} \frac{4 \sqrt{2}-(\cos x+\sin x)^5}{1-\sin 2 x}$. This is a $\frac{0}{0}$ form.Applying $L'H\hat{o}pi

Vedclass · Accepted Answer

$5 \sqrt{2}$

Vedclass · Answer

(A) Let $L = \lim _{x \rightarrow \frac{\pi}{4}} \frac{4 \sqrt{2}-(\cos x+\sin x)^5}{1-\sin 2 x}$. This is a $\frac{0}{0}$ form.Applying $L'H\hat{o}pital's$ Rule:$L = \lim _{x \rightarrow \frac{\pi}{4}} \frac{-5(\cos x+\sin x)^4(-\sin x+\cos x)}{-2 \cos 2 x}$.Using the identity $1-\sin 2x = (\cos x - \sin x)^2$ and $\cos 2x = (\cos x - \sin x)(\cos x + \sin x)$:$L = \lim _{x \rightarrow \frac{\pi}{4}} \frac{5(\cos x+\sin x)^4(\cos x-\sin x)}{2(\cos x-\sin x)(\cos x+\sin x)}$.$L = \lim _{x \rightarrow \frac{\pi}{4}} \frac{5}{2}(\cos x+\sin x)^3$.Substituting $x = \frac{\pi}{4}$:$L = \frac{5}{2}(\frac{1}{\sqrt{2}} + \frac{1}{\sqrt{2}})^3 = \frac{5}{2}(\sqrt{2})^3 = \frac{5}{2}(2 \sqrt{2}) = 5 \sqrt{2}$.

$\lim _{x \rightarrow \frac{\pi}{4}} \frac{4 \sqrt{2}-(\cos x+\sin x)^5}{1-\sin 2 x} = $

Similar Questions

$\mathop {\lim }\limits_{x \to 0} \frac{{{e^{{x^2}}} - \cos x}}{{{x^2}}} = $

$\mathop {\lim }\limits_{x \to 0} \frac{{{e^{\tan x}} - {e^x}}}{{\tan x - x}} = $

$\lim _{x \rightarrow \pi / 6} \left[ \frac{3 \sin x - \sqrt{3} \cos x}{6x - \pi} \right]$ is equal to:

$\mathop {\lim }\limits_{x \to 0} \frac{{\sqrt {1 + \sin x} - \sqrt {1 - \sin x} }}{x} = $

$\mathop {\lim }\limits_{\alpha \to \pi /4} \frac{{\sin \alpha - \cos \alpha }}{{\alpha - \frac{\pi }{4}}} = $

Vedclass Test Series

Exam Paper Generator

Online Exam Module