Trigonometric Functions and Radians

This video tutorial covers the unit circle and trigonometric functions, focusing on converting between radians and degrees, understanding the unit circle, and solving related problems. It also explores the properties of sine and cosine functions and demonstrates how to graph them using Desmos.

What is the primary focus of the review in this video?

• Algebraic equations

• Unit circle and trigonometric functions

• Statistics and probability

• Calculus and derivatives

How do you convert degrees to radians?

• Subtract pi

• Add 180

• Multiply by pi/180

• Multiply by 180/pi

What is the radius of the unit circle?

• 2

• 1

• 0.5

• 3

Which quadrant of the unit circle is initially discussed?

• First quadrant

• Fourth quadrant

• Second quadrant

• Third quadrant

What is the degree measure of pi/6 radians?

• 60 degrees

• 30 degrees

• 90 degrees

• 45 degrees

What is the cosine of 150 degrees?

• -0.866

• 0.866

• 0.5

• -0.5

How do you convert 150 degrees to radians?

• 2pi/3

• pi/3

• 5pi/6

• pi/2

What is the degree equivalent of 7pi/6 radians?

• 270 degrees

• 240 degrees

• 210 degrees

• 180 degrees

What is the amplitude of the function y = -4 sin(2x) + 3?

• 2

• 3

• 4

• 5

What is the period of the function y = 3 cos(12x)?

• pi/6

• pi/3

• pi/2

• pi/4