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Trigonometry quick question

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

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

Just type tan⁡−1−3\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
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.
Original post by Mr M
Don't bother with all that.

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


yes your are right.

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