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Jen
Jen asked in Science & MathematicsMathematics · 9 years ago

Find the limit: lim(x->-pi/2) sinx/cos^2x?

Does sinx/cos^2x = tan x or does that only work for sinx/cosx? Trying to study for an exam that I have in a few hours and I am really not understanding these types of problems.

Here is a picture of the problem which is easier to see: http://tinypic.com/r/2yv8hl1/6

2 Answers

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  • Ed I
    Lv 7
    9 years ago
    Favorite Answer

    lim {x --> -π/2} sin x/cos^2 x = [-1/0] = -∞ or undefined

  • ?
    Lv 7
    9 years ago

    lim sinx/cos^2x = -1 / 0 = -infinity

    x -> -pi/2

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