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Mathematics
Mathematics
Problem
If
α
\alpha
α
-chord of a circle be that chord which subtends an angle
α
\alpha
α
at the centre of the circle. If
x
+
y
=
1
x + y = 1
x
+
y
=
1
is
α
\alpha
α
-chord of
x
2
+
y
2
=
1
x^2 + y^2 = 1
x
2
+
y
2
=
1
, then
α
\alpha
α
is equal to a.
π
6
\frac{\pi}{6}
6
π
b.
π
4
\frac{\pi}{4}
4
π
c.
π
2
\frac{\pi}{2}
2
π
d.
3
π
4
\frac{3\pi}{4}
4
3
π
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