Basic Trigonometric Identities
Trigonometric identities are equations involving the
that are true for every value of the variables involved.
Some of the most commonly used trigonometric identities are derived from the
, like the following:
Simplify the expression using trigonometric identities.
Use the fundamental Pythagorean identity, we get
The Reciprocal identities
The Quotient Identities
Verify the identity,
Consider the expression on the left side of the equation.