If (3)/(2+costheta+isintheta)=a+ib" wher...

If `(3)/(2+costheta+isintheta)`=a+ib" where "i=sqrt(-1) and `a^(2)+b^(2)=lamdaa-3`," the value of " lamda is`

A

3

B

4

C

5

D

6

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