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16 July, 18:00

Which of the six trigonometric functions are not defined at 0?

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  1. 16 July, 20:07
    0
    Using trigonometry table:

    Sine 0 = 0

    Cosine 0 = 1

    Tangent 0 = 0

    Co-secant 0 = 1/sine 0

    = 1/0

    = undefined

    Secant 0 = 1/cos 0

    = 1/1

    = 1

    Cotangent 0 = 1/tan 0

    = 1/0

    = undefined
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