The common chord of \[{{x}^{2}}+{{y}^{2}}-4x-4y=0\] and \[{{x}^{2}}+{{y}^{2}}=16\] subtends at the origin an angle equal to

The common chord of \[{{x}^{2}}+{{y}^{2}}-4x-4y=0\] and \[{{x}^{2}}+{{

1.	The common chord of \[{{x}^{2}}+{{y}^{2}}-4x-4y=0\] and \[{{x}^{2}}+{{y}^{2}}=16\] subtends at the origin an angle equal to
A.	\[\frac{\pi }{6}\]
B.	\[\frac{\pi }{4}\]
C.	\[\frac{\pi }{3}\]
D.	\[\frac{\pi }{2}\]
Answer» E.

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The common chord of \[{{x}^{2}}+{{y}^{2}}-4x-4y=0\] and \[{{x}^{2}}+{{y}^{2}}=16\] subtends at the origin an angle equal to

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