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Question

Question: What is the unit vector along \(\widehat{i} + \widehat{j}\) ?...

What is the unit vector along i^+j^\widehat{i} + \widehat{j} ?

A

i^+j^2\frac{\widehat{i} + \widehat{j}}{\sqrt{2}}

B

2(i^+j^)\sqrt{2}(\widehat{i} + \widehat{j})

C

i^+j^\widehat{i} + \widehat{j}

D

k^\widehat{k}

Answer

i^+j^2\frac{\widehat{i} + \widehat{j}}{\sqrt{2}}

Explanation

Solution

i^+j^1+1\frac{\widehat{i} + \widehat{j}}{\sqrt{1 + 1}} =i^+j^2\frac{\widehat{i} + \widehat{j}}{\sqrt{2}}