Pre-Calculus Flashcards
What is trigonometry?
It studies relationships between side lengths, angles, and triangles
Where did the word trigonometry come from?
Trigōnon - triangle
Metron - measure
What is an angle?
Any amount of rotation generated when a ray is rotated around its endpoint
Real life applications of trigonometry?
ex. measuring (?) rock formation quantities, sound waves
What type of angle is it when the rotation of the a ray is counter clockwise?
A positive angle
What type of angle is it when the rotation of the a ray is clockwise?
A negative angle
What are needed for an angle to be called an angle in standard position?
- The vertex is at the point of origin
- The initial side is along the positive side of x-axis
True or False
All quadrant angles are in standard position, but not all angles in standard position are quadrant angles
True
What is a quadrantal angle?
It is an angle in:
- standard position
- terminal side lies on the x- or y- axis
What is the initial position of a ray called?
The initial side
What is the end position of a ray called?
The terminal side
What are coterminal angles?
Coterminal angles are angles that are both in standard position and have the same terminal sides
What are reference angles?
It is the positive acute angle formed by the terminal side of the given angle and the x-axis
