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If cos alpha + cos beta = 3/2 and sin al...

If `cos alpha + cos beta = 3/2 and sin alpha + sin beta = 1/2 and theta ` is the arithmetic mean of `alpha and beta` then `sin 2 theta + cos 2 theta `

A

`3/5`

B

`4/5`

C

`7/5`

D

`8/5`

Text Solution

Verified by Experts

The correct Answer is:
C
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