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यदि 25cos^(2)theta+5costheta-12=0,(pi)/(...

यदि `25cos^(2)theta+5costheta-12=0,(pi)/(2)ltalphaltpi` का एक मूल `alpha` हो, तब `sin2alpha` बराबर होगा-

A

`24//25`

B

`-24//25`

C

`13//18`

D

`-13//18`

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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