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Frida Riggs
Mathematics
10 February, 11:54
What is the numerical solution of sec^2 (-pi/4) ?
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Jordan Bridges
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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