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If sin 2 alpha + sin 2 beta = 3 "and" co...

`If sin 2 alpha + sin 2 beta = 3 "and" cos 2 alpha + cos 2 beta = 4,"then"-`
` cos2 (alpha + beta)=`

A

`12/25`

B

`7/25`

C

`12/13`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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