If $f(x)=|\cos x|$, then $f^{\prime}(3 \pi / 4)$ is equal to

JEE MATHEMATICS MCQ: DIFFERENTIATION

1 Hard

1 of 1

Application +4 | -1

f(x)=|\cos x|

, then

f^{\prime}(3 \pi / 4)

is equal to

View answer and explanation

Correct option: B

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

Option B is correct because it is the result of differentiating the function in the given neighborhood and evaluating at the specified point.

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f(x)=|x|^{|\tan x|}

f^{\prime}\left(\frac{-\pi}{6}\right)

x

y

x>0

x y=1

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f(x)=[x] \sin (\pi x)

[x]

x

x=k, k

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y = {\sec ^{ - 1}}\left[ {\mathrm{cosec}x} \right] + \mathrm{cose}{\mathrm{c}^{ - 1}}\left[ {\sec x} \right] + {\sin ^{ - 1}}[\cos x] + {\cos ^{ - 1}}[\sin x],

\frac{{dy}}{{dx}}

\frac{d}{d x} \sin ^{-1}\left(3 x-4 x^{3}\right)

z = y + f\left( v \right),

v = \left( {\frac{x}{y}} \right),

v\frac{{\partial z}}{{\partial x}} + \frac{{\partial z}}{{\partial y}}