Trig Intro

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    11-Apr-2017
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Transcript of Trig Intro

  • Pre-Calculus CPEMr. Van Hise

  • sin = opp / hyp

    cos = adj / hyp

    tan = opp / adj csc = hyp / opp

    sec = hyp / adj

    cot = adj / opp

  • yx1Centered at origin

    Radius is 1 unit

    Arc length on unit circle

    corresponds exactly to radian measure(1, 0)(0, -1)(-1, 0)(0, -1)

  • yx

    (x, y)REMEMBER: sin = opp / hypThis diagram represents the sine function on a unit circleIn a unit circle, the hypotenuse is 1

    The length of the opposite side is

    represented by the y-coordinateSO: sin = yoppositehypotenuse

  • hypotenuse

    This diagram represents the cosine function on a unit circleyx(x, y)REMEMBER: cos = adj / hypIn a unit circle, the hypotenuse is 1

    The length of the adjacent side is

    represented by the x-coordinateSO: cos = xadjacent

  • sin = y

    cos = x

    tan = y/x csc = 1 / y

    sec = 1 / x

    cot = x / y