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16 March, 05:38

Find theta to four significant digits for 0 less than or equal theta less than 2pi. secant theta equals negative 2.782

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  1. 16 March, 05:45
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    Ф = 111.06° = 0,617π rad

    Step-by-step explanation:

    sec (Ф) = 1/cos (Ф)

    1/cos (Ф) = - 2.782

    cos (Ф) = - 0.3594

    Ф = arcos (-0.3594)

    Ф = 111.06° * (π/180) = 0,617π radians.
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