# Ch 3  Radian Measure and Circular Functions

Showing the Relationship between Degree and Radian, and Converting Angles from Degree 120º to Radian

Converting Angles 135º. –60º, 15º, 48º to Radian

Converting Angles of 5╥/6, -2╥/9, and 2.1 in Radian to Degree

Determining Coterminal Angles of  ╥/3 and -4╥/5

Determine Six Trig Function Values of  -8╥/3 Using Reference Triangles

## Ch 3.2  Applications of Radian Measure

Arc Length and Area of a Sector :

Finding Arc Length from r=9.5, θ=120º
Finding the Difference of Arc Length of d=12ft and d=11.81ft
Finding Area of a Sector from r=450, θ=240º

Finding Arc Length from r=3cm, θ=120º
Finding the Distance of Earth’s Path Around the Sun in One Month from  r=93 Million Miles

Finding Area of a Sector and Area Bounded by a Chord and Arc;
Finding Area of a Sector from r=8, θ=110º;
Finding Area of a Sector from r=12, θ=80º

## Ch 3.3  The Unit circle and Circular Functions

A way to remember the Entire Unit Circle for Trigonometry

Tricks to remember Angles in Radians