Trigonometry Hand Trick Techniques

The video introduces a simple trigonometry trick using your hand to memorize sine and cosine values for common angles: 0°, 30°, 45°, 60°, and 90°. The instructor demonstrates how to draw and label a hand to represent these angles and explains how to calculate sine and cosine by counting fingers, taking square roots, and dividing by two. The video also covers how to calculate tangent using the sine and cosine values. This method provides an easy way to remember trigonometric values without a calculator.

What is the main topic of the video?

• Memorizing multiplication tables

• A trigonometry trick using a hand

• Understanding calculus concepts

• Learning algebraic equations

Which angles are covered in the trigonometry trick?

• 0°, 30°, 45°, 60°, 90°

• 15°, 45°, 75°, 105°, 135°

• 5°, 15°, 25°, 35°, 45°

• 10°, 20°, 30°, 40°, 50°

What common instrument is used in the trick?

• A protractor

• A ruler

• A calculator

• A hand

How many fingers are used to represent 60° in the trick?

• Two

• Four

• One

• Three

What is the sine of 60° using the hand trick?

• √3/2

• √2/2

• 1

• √1/2

What is the cosine of 60° using the hand trick?

• √3/2

• √2/2

• 1

• √1/2

How many fingers represent 0° in the hand trick?

• Zero

• One

• Three

• Two

What is the cosine of 0° using the hand trick?

• 0

• 1

• √2/2

• √3/2

What is the sine of 0° using the hand trick?

• 0

• 1

• √3/2

• √2/2

How many fingers represent 45° in the hand trick?

• Three

• Four

• One

• Two