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TI-89 Calculator - Sin, Cos, Tan with the TI-89 Calculator - Ti-89 Calculator - Vol 1 - Math Tutor Public Gallery
![Just wondering why my calculator is not giving a result for tan-1(-2/0). The correct answer is apparently meant to be -pi/2 radians. Mode is set radians. : r/EngineeringStudents Just wondering why my calculator is not giving a result for tan-1(-2/0). The correct answer is apparently meant to be -pi/2 radians. Mode is set radians. : r/EngineeringStudents](https://i.redd.it/hi4j8vrkndb71.jpg)
Just wondering why my calculator is not giving a result for tan-1(-2/0). The correct answer is apparently meant to be -pi/2 radians. Mode is set radians. : r/EngineeringStudents
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CALCULATOR: TRIGONOMETRY: Right Angled Triangle: calculate sine cosine tan and other angle by Russell Kightley Media
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