The axes are rotated through an angle, keeping
\( \mathrm{P} \)
ori... VIDEO
The axes are rotated through an angle, keeping
\( \mathrm{P} \)
origin fixed then the equation of the line
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\( 3 x+4 y-12=0 \) becomes \( a x+b y-a b=0 \). If \( \frac{1}{a^{2}}+\frac{1}{b^{2}}=k^{2} \), then the value of \( 12 k \) is
(1) 3
(2) 4
(3) 5
(4) 6
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