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13 August, 19:37

Find all solutions of the equation in the interval [0,2pi)

8sec^2x+4tan^2x-12=0

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  1. 13 August, 22:05
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    8 (1+tan^2x) + 4tan^2x-12=0.

    8+12tan^2x-12=0

    12tan^2x=4

    tanx=1/sqrt (3)

    x=atan (1/sqrt (3))

    x=0.5236
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