1.

The projection of vector, `vec(r)=3hat(i)+hat(j)+2hat(k)`, on the x-y plane has magnitude-A. `3`B. `4`C. `sqrt(14)`D. `sqrt(10)`

Answer» Correct Answer - D
Projection on x-y plane `=sqrt(3^(2)+1^(2))=sqrt(10)`


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