College Algebra Trigonometry

Triangles of TrigonometryBy : Cherie Hamaj

Triangles 45-45-90 30-60-90 Soh Cah Toa Pythagorean Theorem http://www.mathsisfun.com/algebra/trigonom

etry.html

Table of Contents

There are two main triangles used in Trigonometry

45-45-90 30-60-90

Triangles

To find out the lengths of the sides, each side has a variable.

The Hypotenuse is equal to “a square root of 2”

The legs are equal to “a”

45-45-90

The hypotenuse is equal to “2a” The leg across from 60 degreesequal to “a square root of 3” The leg across from 3o degrees is equal to “a”

30-60-90

To find the angles of the triangles, use soh cah toa Soh: sin(opposite/hypotenuse) Cah: cos(adjacent/hypotenuse) Toa: tan(opposite/adjacent)

Soh Cah Toa

Another method to find the length of sides is the Pythagorean theorem. The sides are labeled a, b, and c The equation is a^2+b^2=c^2

Pythagorean Theorem

College Algebra Trigonometry

Triangles of TrigonometryBy : Cherie Hamaj