Line $y = x + a\sqrt 2 $ is a tangent to the circle ${x^2} + {y^2} = {a^2}$ at
Line $y = x + a\sqrt 2 $ is a tangent to the circle ${x^2} + {y^2} = {a^2}$ at
- A
$\left( {\frac{a}{{\sqrt 2 }},\frac{a}{{\sqrt 2 }}} \right)$
- B
$\left( { - \frac{a}{{\sqrt 2 }}, - \frac{a}{{\sqrt 2 }}} \right)$
- C
$\left( {\frac{a}{{\sqrt 2 }}, - \frac{a}{{\sqrt 2 }}} \right)$
- D
$\left( { - \frac{a}{{\sqrt 2 }},\frac{a}{{\sqrt 2 }}} \right)$
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- [IIT 1985]
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