🛠️ JEE➗ Maths

If \(\vec{OA}=\sqrt{3}\overset{^}{ı}+\overset{^}{ȷ},\vec{OB}=\overset{^}{ı}+\sqrt{3}\overset{^}{ȷ}\). If the distance of…

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If \(\vec{OA}=\sqrt{3}\overset{^}{ı}+\overset{^}{ȷ},\vec{OB}=\overset{^}{ı}+\sqrt{3}\overset{^}{ȷ}\). If the distance of the point \(a\overset{^}{ı}+(1-a)\overset{^}{ȷ}\) from the angle bisector of \(\vec{OA}\) and \(\vec{OB}\) is \(\frac{9}{\sqrt{2}}\) the find \(a.\)

a

1

b

3

c

4

d

5

✓ Correct answer: d)

5

Explanation

Equation of anlge bisector will be

\(x-y=0\\ \left|\frac{a-(1-a)}{\sqrt{2}}\right|=\frac{9}{\sqrt{2}}\\ 2a-1=\pm 9\\ a=5,-4\)

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