Yue Chong-shan
Abstract
Using classical differential geometry method,we redefine tangent and secant function of plane curve,and obtain some results about it:tangent and secant function of plane curve is a continuous function with the second variable;tangent and secant functions of smooth plane curves are smooth with both variables.
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Using classical differential geometry method,we redefine tangent and secant function of plane curve,and obtain some results about it:tangent and secant function of plane curve is a continuous function with the second variable;tangent and secant functions of smooth plane curves are smooth with both variables.
Key concepts: Secant method, Tangent, Tangent vector, Mathematics, Plane curve, Mathematical analysis, Function (biology), Inverse trigonometric functions