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If the equation sin^4x-(k+2)sin^2x=(k+3)...

If the equation `sin^4x-(k+2)sin^2x=(k+3)` has a solution then `' k '` must lie in the interval: a.`(-4,-2)` b. `[-3,2)` c. `(-4,-3)` d. `[-3,-2]`

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