1
CBSE 12th Mathematics Delhi Set 1 - 2024
MCQ (Single Correct Answer)
+1
-0

The Cartesian equation of the line passing through the point $(1,-3,2)$ and parallel to the line $\vec{r}=(2+\lambda) \hat{i}+\lambda \hat{j}+(2 \lambda-1) \hat{k}$ is

A
$\frac{x-1}{2}=\frac{y+3}{0}=\frac{z-2}{-1}$
B
$\frac{x+1}{1}=\frac{y-3}{1}=\frac{z+2}{2}$
C
$\frac{x+1}{2}=\frac{y-3}{0}=\frac{z+2}{-1}$
D
$\frac{x-1}{1}=\frac{y+3}{1}=\frac{z-2}{2}$
2
CBSE 12th Mathematics Delhi Set 1 - 2024
MCQ (Single Correct Answer)
+1
-0

If $A$ and $B$ are events such that $P(A / B)=P(B / A) \neq 0$, then

A
$A \subset B$, but $A \neq B$
B
$A=B$
C
$A \cap B=\phi$
D
$P(A)=P(B)$
3
CBSE 12th Mathematics Delhi Set 1 - 2024
MCQ (Single Correct Answer)
+1
-0

Assertion (A): Domain of $y=\cos ^{-1}(x)$ is $[-1,1]$.

Reason ( R ): The range of the principal value branch of $y=\cos ^{-1}(x)$ is $[0, \pi]-\left\{\frac{\pi}{2}\right\}$

A
Both Assertion (A) and Reason (R) are true and the Reason ( $R$ ) is the correct explanation of the Assertion (A).
B
Both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of the Assertion (A).
C
Assertion (A) is true, but Reason (R) is false.
D
Assertion (A) is false, but Reason (R) is true.
4
CBSE 12th Mathematics Delhi Set 1 - 2024
MCQ (Single Correct Answer)
+1
-0

Assertion (A): The vectors

$$\begin{aligned} & \vec{a}=6 \hat{i}+2 \hat{j}-8 \hat{k} \\ & \vec{b}=10 \hat{i}-2 \hat{j}-6 \hat{k} \\ & \vec{c}=4 \hat{i}-4 \hat{j}+2 \hat{k} \end{aligned}$$

represent the sides of a right angled triangle.

Reason (R): Three non-zero vectors of which none of two are collinear forms a triangle if their resultant is zero vector or sum of any two vectors is equal to the third.

A
Both Assertion (A) and Reason (R) are true and the Reason ( $R$ ) is the correct explanation of the Assertion (A).
B
Both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of the Assertion (A).
C
Assertion (A) is true, but Reason (R) is false.
D
Assertion (A) is false, but Reason (R) is true.
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