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10 February, 11:54

What is the numerical solution of sec^2 (-pi/4) ?

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  1. 10 February, 12:11
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    Sec² (-π/4)

    sec x = 1 / cos x

    cos (-π/4) = cos (π/4) as even function

    cos (π/4) = (√2) / 2

    sec (-π/4) = 1 / (cos (-π/4)) = 1/cos (π/4) = 2 / (√2)

    sec² (-π/4) = (2 / (√2)) ² = 4/2=2

    sec² (-π/4) = 2
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