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2 October, 09:51

Find the exact value of sec (-pi/3).

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  1. 2 October, 12:28
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    Sec x = 1 / cos x

    cos ( - π / 3) = 1/2

    1 / cos (-π/3) = 1 / 1/2 = 1 : 1/2 = 2
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