The tangent galvanometer is a scientific instrument used to measure electric current, first used in the 19th century. It uses the tangent law of magnetism to measure the strength of magnetic fields. The instrument typically has an upright coil of copper wire with a compass needle in the middle. The needle rotates in response to […]
Tangent lines are a geometric relationship between a line and a curve, determining the slope of a curve at a point. Circles have an infinite number of tangents, and spheres have tangent planes. Trigonometry defines the tangent of an angle in a triangle. Tangents are used in calculus to observe the instantaneous rate of change […]
