Powers. x a x b = x a + b . x a y a = xy a. x a b = x ab . x a/b = bth root of x a = bth root x a. x a = 1 / x a. x a  b = x a / x b. Logarithms. y = logb x if and only if x=b y. logb 1 = 0. logb b = 1. logb x*y = logb x + logb y . logb x/y = logb x  logb y . logb x n = n logb x . logb x = logb c * logc x = logc x / logc b .Tr.nometry and Complex Exponentials. Amazingly, trig functions can also be expressed back in terms of the complex exponential. Then everything involving trig functions can be transformed into something involving the exponential function. This is very surprising. In order to easily obtain trig iden.ies like $ \cos x ^2 + .Now that we have a good reason to pick a particular base, we will be talking a lot about the new function $ e^x $ and its inverse function $ log_e x $ . This function is so useful that it has its own name, $ \ln x $ , the natural logarithm. Properties of the Natural Logarithm. Properties of the logarithm and the exponential .Powers. x a x b = x a + b . x a y a = xy a. x a b = x ab . x a/b = bth root of x a = bth root x a. x a = 1 / x a. x a  b = x a / x b. Logarithms. y = logb x if and only if x=b y. logb 1 = 0. logb b = 1. logb x*y = logb x + logb y . logb x/y = logb x  logb y . logb x n = n logb x . logb x = logb c * logc x = logc x / logc b .
Powers x a x b = x a + b x a y a = xy a x a b = x ab x a/b = b th root of x a = b th x a. x a = 1 / x a. x a  b = x a / x b. Logarithms y .List of tr.nometric iden.ies. Cosines and sines around the unit circle. Tr.nometry; Outline; History; Usage Relation to the complex exponential function.As functions of a real variable, exponential functions are uniquely characterized by the fact that the growth rate of such a function i.e., its derivative is directly proportional to the value of the function..Free math lessons and math homework help from basic math to alge., geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math .
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