Angles, Unit Circle, and Trigonometric Identity

Question 1

Convert radian angle measure into degrees

Answer 1

Radian x 180/Pi

Question 2

Find the length of each arc

Answer 2

Degree/360 x radius(x2pi)

Question 3

Find the reference angle

Answer 3

Q1: same
Q2: 180 - degree
Q3: degree - 180
Q4: 360 - degree

Question 4

Convert degrees angle measures into radians

Answer 4

Degree/360 x 2pi

Question 5

Cos and Tan

Answer 5

A^2 + Top^2= Bottom^2

A= Adjacent
Bottom= Hypotenuse

Question 6

Sin and Tan

Answer 6

Bottom^2 + b^2 = Top^2

B= Opposite
Top= Hypotenuse