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The range of values of a such that the a...

The range of values of `a` such that the angle `theta` between the pair of tangents drawn from `(a,0)` to the circle `x^2+y^2=1` satisfies `pi/2

Text Solution

Verified by Experts

a>1
whe a=1
`theta=2pi/2=pi`
`1ltaltsqrt2`
`-sqrt2ltalt-1`
`a in{(-sqrt2-1)uu(1,sqrt2)}`
option b is correct.
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