The angle between the pair of straight lines \[{{y}^{2}}{{\sin }^{2}}\theta -xy{{\sin }^{2}}\theta +{{x}^{2}}({{\cos }^{2}}\theta -1)=1,\]is [MNR 1985; UPSEAT 2000; Kerala (Engg.) 2005]

The angle between the pair of straight lines \[{{y}^{2}}{{\sin }^{2}}\

1.	The angle between the pair of straight lines \[{{y}^{2}}{{\sin }^{2}}\theta -xy{{\sin }^{2}}\theta +{{x}^{2}}({{\cos }^{2}}\theta -1)=1,\]is [MNR 1985; UPSEAT 2000; Kerala (Engg.) 2005]
A.	\[\frac{\pi }{3}\]
B.	\[\frac{\pi }{4}\]
C.	\[\frac{2\pi }{3}\]
D.	None of these
Answer» E.

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The angle between the pair of straight lines \[{{y}^{2}}{{\sin }^{2}}\theta -xy{{\sin }^{2}}\theta +{{x}^{2}}({{\cos }^{2}}\theta -1)=1,\]is [MNR 1985; UPSEAT 2000; Kerala (Engg.) 2005]

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