Term
What is a reference angle? 

Definition
= An acute angle formed by the terminal side of the given angle and the xaxis. 


Term
Finding reference angle for an angle in first quadrant. 

Definition
= theta (its its own angle) 


Term
Finding reference angle for an angle in second quadrant. 

Definition


Term
Finding reference angle for an angle in third quadrant. 

Definition


Term
Finding reference angle for an angle in fourth quadrant. 

Definition


Term
What trigonometric function is positive in the first quadrant? 

Definition


Term
In a circle whose radius is other than 1: sin is equal to? 

Definition
= y/r(also know that sin corresponds to the x axis) 


Term
In a circle whose radius is other than 1: cos is equal to? 

Definition
= x/r(also know that cos correspond to the y axis) 


Term
In a circle whose radius is other than 1: 

Definition


Term
What are quadrantal angles? 

Definition
Angle whose terminal side lies on one of the axes. 


Term
Exact values draw the 30 , 60, 90 triangle with side ratios. 

Definition


Term
Exact values draw the 45 , 45, 90 triangle with side ratios. 

Definition


Term
Exact values draw the circle with quadrantal angles. 

Definition


Term
How to express as function of an angle less than 45 degrees? 

Definition
1. Express as as a reference angle.
2. Express as the equivalent cofunction of the complement. 

