\( \cos a \) is a root of \( 25 x^{2}+5 x-12=0,-1x0 \) the value of \( \sin 2 a \) (A) \( \frac{...
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0\( \cos a \) is a root of \( 25 x^{2}+5 x-12=0,-1x0 \) the value of \( \sin 2 a \)
(A) \( \frac{12}{25} \)
(B) \( \frac{-12}{25} \)
(C) \( \frac{-24}{25} \)
(D) \( \frac{20}{25} \)
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