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March 26, 2017

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evaluate the trigonometric functions by memory or by constructing appropriate triangles for the given special angles.

a) csc 30 degrees
b) sin pi/4 = sqrt2 / 2

I just do not know how to find csc 30 degrees.

  • Pre-Cal - ,

    You should know that cscx = 1/sinx

    so

    csc 30
    = 1/sin 30
    = 1/(1/2) = 2

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