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Vector or Cross Product — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsVector or Cross Product1 Mark
Question
If $\vec{\text{a}}$ is any vector, then $\big(\vec{\text{a}}\times\hat{\text{i}}\big)^2+\big(\vec{\text{a}}\times\hat{\text{j}}\big)^2+\big(\vec{\text{a}}\times\hat{\text{k}}\big)^2=$
  1. $\vec{\text{a}}^2$
  2. $2\vec{\text{a}}^2$
  3. $3\vec{\text{a}}^2$
  4. $4\vec{\text{a}}^2$
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