1
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $e^x=y+\sqrt{y^2-1}$, then $\frac{d y}{d x}=$

A
$\sinh x$
B
$\cosh x$
C
$\tanh x$
D
$-\sinh x$
2
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $x=\log p$ and $y=\frac{1}{p}$, then $\frac{d y}{d x}=$

A
$-e^{-x}$
B
$e^x$
C
$x$
D
$y$
3
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Electric current $(I)$ is measured by galvanometer, the current being proportional to the tangent of the angle ( $\theta$ ) of deflection. If the deflection is read as $45^{\circ}$ and an error of $1 \%$ is made in reading it, the percentage error in the current is

A
$\pi$
B
$\pi / 2$
C
$\pi / 3$
D
$\pi / 4$
4
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the equation of a tangent drawn to the curve $y=\cos (x+y),-1 \leq x \leq 1+\pi$ is $x+2 y=k$, then $k=$

A
1
B
$\pi / 4$
C
$\pi / 2$
D
2
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