Using the Sin, Cos and Tan FUNCTINs on the scientific calculator#trigonometry #significantfigures - YouTube
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
Algebra 2 11.03c - Tangent on the Calculator - YouTube