FunCal

4. a rule or equation describing the relationship of two or more variables or quantities, e.g. A = πr2
6. the operation in calculus (inverse to the operation of integration) of finding the derivative of a function or equation
7. a mathematical statement or hypothesis which has been proved on the basis of previously established theorems and previously accepted axioms, effectively the proof of the truth of a statement or expression
8. the inverse operation to exponentiation, the exponent of a power to which a base (usually 10 or e for natural logarithms) must be raised to produce a given number, e.g. because 1,000 = 10³, the log_10 100 = 3

1. the mathematical operation where a number (the base) is multiplied by itself a specified number of times (the exponent), usually written as a superscript an, where a is the base and n is the exponent, e.g. 4³ = 4 x 4 x 4
2. the branch of mathematics that studies the relationships between the sides and the angles of right triangles, and deals with and with the trigonometric functions
3. a branch of mathematics that uses symbols or letters to represent variables, values or numbers, which can then be used to express operations and relationships and to solve equations
5. the ratio of a circumference of a circle to its diameter, an irrational (and transcendental) number approximately equal to 3.141593
6. a measure of how a function changes as its input changes, i.e. the best linear approximation of the function at a particular input value, as represented by the slope of the tangent line to the graph of the function at that point, found by the operation of differentiation.