![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
![Can someone let me know how I can use the reverse tangent feature on this calculator? I press the tan key but it does not show me how to input a reverse Can someone let me know how I can use the reverse tangent feature on this calculator? I press the tan key but it does not show me how to input a reverse](https://preview.redd.it/qudxru7sfbm71.jpg?auto=webp&s=8226e1d7404a27047e429bca3c8a2edca1b1ca32)
Can someone let me know how I can use the reverse tangent feature on this calculator? I press the tan key but it does not show me how to input a reverse
![trigonometry functions push buttons of scientific calculator with focus on cos button Stock Photo - Alamy trigonometry functions push buttons of scientific calculator with focus on cos button Stock Photo - Alamy](https://c8.alamy.com/comp/EEJT99/trigonometry-functions-push-buttons-of-scientific-calculator-with-EEJT99.jpg)
trigonometry functions push buttons of scientific calculator with focus on cos button Stock Photo - Alamy
![Sin, Cos, and Tan with the TI-84 Graphing Calculator | Math Tutor DVD - Online Math Help, Math Homework Help, Math Problems, Math Practice! Sin, Cos, and Tan with the TI-84 Graphing Calculator | Math Tutor DVD - Online Math Help, Math Homework Help, Math Problems, Math Practice!](https://i.ytimg.com/vi/69rwfMGUYjM/maxresdefault.jpg)