What is the exact value of arctan (-1)?

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What is the exact value of arctan (-1)?

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Answer 1 · 2015-09-14T07:30:10

135 degrees

Explanation:

arctan(-1) or, ${tan}^{- 1} - 1$ $tan^-1 -1$ is the angle whose tan value is -1. This would be in the second quadrant and would equal 180-45. Tan (180-45) is - tan45 =-1

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What is the exact value of arctan (-1)?

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