Trigonometry

Question 1

Formation of an angle

Answer 1

An angle formed when a ray is rotated about a fixed point called the vertex

Question 2

Standard position

Answer 2

When the vertex is at the origin the initial atm lies on the positive x axis and the terminal arm can be in any of the quadrants

Question 3

Terminal arm

Answer 3

Arm that rotates

Question 4

Initial arm

Answer 4

The arm that is fixed

Question 5

Positive angle

Answer 5

An angle formed by a counter clockwise rotation of the terminal arm

Question 6

Negative angle

Answer 6

An angle formed by a clockwise rotation of the terminal arm

Question 7

Coterminous angles

Answer 7

Angles that share the same initial and terminal arm

Question 8

Principal angle

Answer 8

The angle between 0 and 360 degrees

Question 9

Related acute angle

Answer 9

Angle formed by the terminal arm of an angle is standard position and the x axis

Question 10

Identity

Answer 10

Equations which are satisfied for all values of the variable for which they are defined