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Posted by on Thursday, January 7, 2010 at 8:38pm.

how do you find the function csc 225 degrees without using a calculator?

  • MATH ANALYSIS - , Thursday, January 7, 2010 at 8:51pm

    It will have the same sign as 1/csc225 = sin 225, which is negative in the third quadrant.
    The absolute value is the same as that of reference angle to the 180 degree, -x axis, which is 45 degrees.

    csc 45 = 1/sin 45 = sqrt 2

    The value of csc 225 is therefore
    -sqrt2 = -1.414

  • MATH ANALYSIS - , Thursday, January 7, 2010 at 8:53pm

    thank you drwls!

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