If the acute angles between the pairs of lines \[3{{x}^{2}}-7xy+4{{y}^{2}}=0\] and \[6{{x}^{2}}-5xy+{{y}^{2}}=0\] be \[{{\theta }_{1}}\] and \[{{\theta }_{2}}\] respectively, then

\[{{\theta }_{1}}=2{{\theta }_{2}}\]

\[{{\theta }_{1}}={{\theta }_{2}}\]

\[2{{\theta }_{1}}={{\theta }_{2}}\]

If the acute angles between the pairs of lines \[3{{x}^{2}}-7xy+4{{y}^

1.	If the acute angles between the pairs of lines \[3{{x}^{2}}-7xy+4{{y}^{2}}=0\] and \[6{{x}^{2}}-5xy+{{y}^{2}}=0\] be \[{{\theta }_{1}}\] and \[{{\theta }_{2}}\] respectively, then
A.	\[{{\theta }_{1}}={{\theta }_{2}}\]
B.	\[{{\theta }_{1}}=2{{\theta }_{2}}\]
C.	\[2{{\theta }_{1}}={{\theta }_{2}}\]
D.	None of these
Answer» B. \[{{\theta }_{1}}=2{{\theta }_{2}}\]

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If the acute angles between the pairs of lines \[3{{x}^{2}}-7xy+4{{y}^{2}}=0\] and \[6{{x}^{2}}-5xy+{{y}^{2}}=0\] be \[{{\theta }_{1}}\] and \[{{\theta }_{2}}\] respectively, then

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