Day 277: CBSE Class 12 Maths

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

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1. A.
   $5\hat{i} + \hat{j} + 6k$
2. B.
   $\hat{i} + 3\hat{j} + 5\hat{k}$
3. C.
   $2\hat{i} - 2\hat{j}$
4. D.
   $9\hat{i} - 3\hat{j}$

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1. A.
   $\pm 49$
2. B.
   $\pm 5$
3. C.
   $\pm 1$
4. D.
   $\pm 7$

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1. A.
   $\mathbb{R}$
2. B.
   $1$
3. C.
   $0$
4. D.
   $-1$

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