A) \[3x+4y=\pm 2\sqrt{5}\]
B) \[6x+8y=\pm \sqrt{5}\]
C) \[3x+4y=\pm \sqrt{5}\]
D) None of these
Correct Answer: C
Solution :
Equation of tangent \[y=\frac{-3}{4}x\pm \frac{1}{\sqrt{5}}\sqrt{1+{{\left( \frac{-3}{4} \right)}^{2}}}\] Þ \[y=\frac{-3}{4}x\pm \frac{1}{\sqrt{5}}\sqrt{\frac{16+9}{16}}\] Þ \[4y=-3x\pm \sqrt{5}\Rightarrow 3x+4y=\pm \sqrt{5}\]You need to login to perform this action.
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