1
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
If $$y = \sin (m{\sin ^{ - 1}}x)$$, then which one of the following equations is true?
A
$$(1 - {x^2}){{{d^2}y} \over {d{x^2}}} + x{{dy} \over {dx}} + {m^2}y = 0$$
B
$$(1 - {x^2}){{{d^2}y} \over {d{x^2}}} - x{{dy} \over {dx}} + {m^2}y = 0$$
C
$$(1 + {x^2}){{{d^2}y} \over {d{x^2}}} - x{{dy} \over {dx}} - {m^2}y = 0$$
D
$$(1 + {x^2}){{{d^2}y} \over {d{x^2}}} + x{{dy} \over {dx}} - {m^2}x = 0$$
2
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
The principal value of $$[{\tan ^{ - 1}}\sqrt 3 - {\cot ^{ - 1}}( - \sqrt 3 )]$$ is
A
$$\pi$$
B
$$ - {\pi \over 2}$$
C
0
D
$$2\sqrt 3 $$
3
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
The maximum value of $${\left( {{1 \over x}} \right)^{x}}$$ is
A
e1/e
B
e
C
$${\left( {{1 \over e}} \right)^{1/e}}$$
D
ee
4
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
Let matrix $$X = [{x_{ij}}]$$ is given by $$X = \left[ {\matrix{ 1 & { - 1} & 2 \cr 3 & 4 & { - 5} \cr 2 & { - 1} & 3 \cr } } \right]$$. Then the matrix $$Y = [{m_{ij}}]$$, where mij = Minor of xij, is
A
$$\left[ {\matrix{ 7 & { - 5} & { - 3} \cr {19} & 1 & { - 11} \cr { - 11} & 1 & 7 \cr } } \right]$$
B
$$\left[ {\matrix{ 7 & { - 19} & { - 11} \cr 5 & { - 1} & { - 1} \cr 3 & {11} & 7 \cr } } \right]$$
C
$$\left[ {\matrix{ 7 & {19} & { - 11} \cr { - 3} & {11} & 7 \cr { - 5} & { - 1} & { - 1} \cr } } \right]$$
D
$$\left[ {\matrix{ 7 & {19} & { - 11} \cr { - 1} & { - 1} & 1 \cr { - 3} & { - 11} & 7 \cr } } \right]$$
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