Trigonometry – Keys to remember the 6 Basic Trigonometric Functions

By | September 30, 2016

6 Basic Trigonometric Functions

In this tutorial the students will learn about the 6 Basic Trigonometric Functions.  They will also see how the functions relate to the Unit Circle and Right Triangles.  Lastly, the students will also be introduced to the Pythagorean Identities.

Key Skills

Pythagorean Identities

sin²x + cos²x = 1

1 + cot²x = csc²x

tan²x + 1 = sec²x

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)

x = cos (Θ)

y = sin (Θ)

y/x = tan (Θ)

x/y = cot (Θ)