1
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The value of $\cos \left(2 \cos ^{-1} x+\sin ^{-1} x\right)$ at $x=\frac{1}{5}$ where $0 \leq \cos ^{-1} x \leq \pi$ and $-\frac{\pi}{2} \leq \sin ^{-1} x \leq \frac{\pi}{2}$, is

A
$\frac{\sqrt{6}}{5}$
B
$-\frac{\sqrt{6}}{5}$
C
$\frac{2 \sqrt{6}}{5}$
D
$-\frac{2 \sqrt{6}}{5}$
2
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

Considering only the principal values of inverse function, the set

$$A=\left\{x \geq 0 / \tan ^{-1}(2 x)+\tan ^{-1}(3 x)=\frac{\pi}{4}\right\}$$

A
is an empty set.
B
is a singleton set.
C
contains more than two elements.
D
contains two elements.
3
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The slopes of the lines given by $x^2+2 h x y+2 y^2=0$ are in the ratio $1: 2$, then $h$ is

A
$\frac{1}{2}$
B
$\frac{3}{2}$
C
$3$
D
$1$
4
MHT CET 2024 2nd May Morning Shift
MCQ (Single Correct Answer)
+2
-0

If $y=\left[\mathrm{e}^{4 x}\left(\frac{x-4}{x+3}\right)^{\frac{3}{4}}\right]$ then $\frac{\mathrm{d} y}{\mathrm{~d} x}=$

A
$\frac{\mathrm{d} y}{\mathrm{~d} x}=y\left[4+\frac{21}{4(x-4)(x+3)}\right]$
B
$\frac{\mathrm{d} y}{\mathrm{~d} x}=\left[4+\frac{21}{4(x-4)(x+3)}\right]$
C
$\frac{\mathrm{d} y}{\mathrm{~d} x}=\frac{1}{y}\left[4+\frac{21}{4(x-4)(x+3)}\right]$
D
$\frac{\mathrm{d} y}{\mathrm{~d} x}=y\left[4+\frac{21}{4(x+4)(x+3)}\right]$
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