The equation 4Sin2x + 4Sinx + a2 – 3 = 0 has  a solution if

The equation 4Sin2x + 4Sinx + a2 - 3 = 0 has  a solution if

  1. A

    2a2

  2. B

    1a1

  3. C

    3a3

  4. D

    4a4

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    Solution:

    sinx=4±1616(a23)8

    11±4a221

    21±4a22

    04a23

    4a20a[2,2]

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