Unit vector in the direction of the resultant of vectors $\mathrm{A}=-3\hat{\mathrm{i}}-2\hat{\mathrm{j}}-3\hat{\mathrm{k}} \mathrm{and} \mathrm{B}=2\hat{\mathrm{i}}+4\hat{\mathrm{j}}+6\hat{\mathrm{k}}$

• A

  $\frac{-3\hat{\mathrm{i}}-2\hat{\mathrm{j}}-3\hat{\mathrm{k}}}{\sqrt{14}}$

• B

  $-\hat{\mathrm{i}}+2\hat{\mathrm{j}}+3\hat{\mathrm{k}}$

• C

  $\frac{-\hat{\mathrm{i}}+2\hat{\mathrm{j}}+3\hat{\mathrm{k}}}{\sqrt{14}}$

• D

  $-2\hat{\mathrm{i}}-4\hat{\mathrm{j}}+8\hat{\mathrm{k}}$