# All about Algebra - Study about algebra

## Solve linear formulas for a given variable

Solving formulas is much like solving general linear equations. The only difference is we will have several variables in the problem and we will be attempting to solve for one specific variable. For example, we may have a formula...

## Determine of Cosine (A – B )

We can prove that cos (A – B) = cos A – cos B is not an identity by finding one pair of values of A and B for which each side of the equation is defined and the...

## Proving the identity of trigonometric

The eight basic identities are used to prove other identities. To prove an identity means to show that the two sides of the equation are always equivalent. It is generally more efficient to work with the more complicated side...

## The basic identities of trigonometric

Throughout our study of mathematics, we have used the solution of equations to solve problems. The domain of an equation is the set of numbers for which each side of the equation is defined. When the solution set is...

## LOGARITHMIC RELATIONSHIPS

Because a logarithm is an exponent, the rules for exponents can be used to derive the rules for logarithms. Just as the rules for exponents only apply to powers with like bases, the rules for logarithms will apply to...

## Logarithmic form of an exponential equation

An exponential equation and a logarithmic equation are two different ways of expressing the same relationship. For example, to change an exponential equation to a logarithmic equation, recall that a logarithm or log is an exponent. In the exponential...