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Q.

If the chord y = mx +1 of the circle x2+y2=1  subtends an angle of measure 450  at the major segment of the circle then m =

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a

–2

b

2

c

3

d

–1

answer is B.

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Detailed Solution

x2+y2=(y−mx)2

Coefficients of x2  + coefficients of y2=0

⇒m=±1

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