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If : `cos theta_(1) = 2 * cos theta_(2),` ltbr gt `"then" (tan""(theta_(1)-theta_(2))/(2))(tan""(theta_(1) + theta_(2))/(2))=` A)`(1)/(3)` B)`-(1)/(3)

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If : `cos theta_(1) = 2 * cos theta_(2),` ltbr gt `"then" (tan""(theta_(1)-theta_(2))/(2))(tan""(theta_(1) + theta_(2))/(2))=` A)`(1)/(3)` B)`-(1)/(3)` C)1 D)-1
A. `(1)/(3)`
B. `-(1)/(3)`
C. 1
D. -1
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Correct Answer - A
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