1
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
If $$\sin y = x\cos (a + y)$$, then $${{dx} \over {dy}}$$ is
A
$${{\cos a} \over {{{\cos }^2}(a + y)}}$$
B
$${{ - \cos a} \over {{{\cos }^2}(a + y)}}$$
C
$${{\cos a} \over {{{\sin }^2}y}}$$
D
$${{ - \cos a} \over {{{\sin }^2}y}}$$
2
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
The points on the curve $${{{x^2}} \over 9} + {{{y^2}} \over {25}} = 1$$, where tangent is parallel to x-axis are
A
($$\pm$$ 5, 0)
B
(0, $$\pm$$ 5)
C
(0, $$\pm$$ 3)
D
($$\pm$$ 3, 0)
3
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
Three points P(2x, x + 3), Q(0, x) and R(x + 3, x + 6) are collinear, then x is equal to
A
0
B
2
C
3
D
1
4
CBSE 12th Math (Term 1) Paper 2021-22
MCQ (Single Correct Answer)
+1
-0
The principal value of $${\cos ^{ - 1}}\left( {{1 \over 2}} \right) + {\sin ^{ - 1}}\left( { - {1 \over {\sqrt 2 }}} \right)$$ is
A
$${\pi \over {12}}$$
B
$$\pi$$
C
$${\pi \over 3}$$
D
$${\pi \over 6}$$
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