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If alpha is a root of 25cos^2theta+5cost...

If `alpha` is a root of `25cos^2theta+5costheta-12=0,pi/2ltalphaltpi` the `sin2alpha` is equal to:

A

`24/25`

B

`(-24)/(25)`

C

`13/18`

D

`(-13)/(18)`

Text Solution

Verified by Experts

The correct Answer is:
B
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