Given \overrightarrow{{A}}=2 \stackrel{\^}{{i}}-\stackrel{\^}{{j}}+2 \stackrel{\^}{{k}} and \overrightarrow{{B}}=-\stackrel{\^}{{i}}-2 \stackrel{\^}{{j}}+2 {{k^{\^}}}(\stackrel{\^}{{i}}, \stackrel{\^}{{j}} and \stackrel{\^}{{k}} are unit vectors along x, y & z axes respectively). The unit vector in the direction of A^{\to} − B^{\to} is:

Correct Answer is : 3^i+^j√10

\stackrel{\^}{3 {i}}/{\\sqrt{10}

\stackrel{\^}{3 {i}+j^{\^}}/{\\sqrt{10}

\stackrel{\^}{-3 {i}+k^{\^}}/{\\sqrt{10}

UPSC NDA Math Model Paper 9

Question : 75 of 120

Marks: +1, -0

Given

→

−

and

→

=−

−2

(

and

are unit vectors along x, y & z axes respectively). The unit vector in the direction of

→

−

→

is:

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