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Trigonometry quick question

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    How would you find the angles using the quadrant method when given a negative number like tanx = -3
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    Don't bother with all that.

    Just type \tan^{-1} -3 into your calculator and then add or subtract multiples of 180 degrees.
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    (Original post by Mr M)
    Don't bother with all that.

    Just type \tan^{-1} -3 into your calculator and then add or subtract multiples of 180 degrees.
    Thanks that's a much easier method, we got taught that we have to use cast diagrams
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    (Original post by IShouldBeRevising_)
    How would you find the angles using the quadrant method when given a negative number like tanx = -3
    by using the negative axices.
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    (Original post by Mr M)
    Don't bother with all that.

    Just type \tan^{-1} -3 into your calculator and then add or subtract multiples of 180 degrees.
    yes your are right.

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Updated: April 22, 2012
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