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The equation 2sin^3theta+(2lambda-3)sin^...

The equation `2sin^3theta+(2lambda-3)sin^2theta-(3lambda+2)sintheta-2lambda=0` has exactly three roots in `(0,2pi)` , then `lambda` can be equal to 0 (b) 2 (c) 1 (d) `-1`

A

-1

B

0

C

`(1)/(2)`

D

1

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