## Trigonometry – Trigonometric Identities – Example 4

Trigonometric Identities In this tutorial the students learn how to use trigonometric identities and properties of trigonometry to prove that trigonometric expressions are equal. Virginia Standards of Learning (SOL) T.5 Key Skills Trigonometric Identities 1/cos(x) = sec(x) 1/sin(x) = csc(x) tan(x) = sin(x)/cos(x) 1/tan(x) = cos(x)/sin(x) 1/tan(x) = cot(x) Pythagorean Identities sin²x + cos²x = 1 1… Read More »