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Chris
Chris asked in Science & MathematicsMathematics · 2 years ago

Show that y = sec x is an even function.?

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  • Steve A
    Lv 7
    2 years ago
    Favorite Answer

    For an even function, f(x) = f(-x)

    Sec x = 1/(cos x)

    Is cos x an even.function?

    Yes. cos(π) = cos(-π) = cos(3π/2)

  • ?
    Lv 7
    2 years ago

    y = sec(-x) = 1/cos(-x) = 1/cos(x) = sec(x). You got the original function, so secant is even.

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