Trigonometry Hand Trick Concepts

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

What is the main purpose of the trigonometry trick introduced in the video?

• To understand the history of trigonometry

• To calculate complex trigonometric equations

• To memorize sine and cosine of basic angles

• To learn advanced trigonometry concepts

Which angles are labeled on the hand in the trigonometry trick?

• 15°, 30°, 45°, 60°, 75°

• 0°, 30°, 45°, 60°, 90°

• 10°, 20°, 30°, 40°, 50°

• 5°, 25°, 45°, 65°, 85°

How many fingers are used to represent the sine value of 60 degrees?

• 4 fingers

• 2 fingers

• 1 finger

• 3 fingers

What is the cosine value of 60 degrees using the hand trick?

• 1/2

• √2/2

• √3/2

• 0

What is the sine value of 0 degrees using the hand trick?

• √2/2

• 0

• 1

• 1/2

What is the cosine value of 0 degrees using the hand trick?

• 1/2

• 0

• 1

• √3/2

How many fingers are used to represent the sine value of 45 degrees?

• 3 fingers

• 2 fingers

• 1 finger

• 4 fingers

What is the cosine value of 45 degrees using the hand trick?

• √3/2

• 1/2

• √2/2

• 0

How is the tangent of an angle calculated using the hand trick?

• Sine multiplied by cosine

• Sine plus cosine

• Sine divided by cosine

• Cosine divided by sine

What is the main advantage of using the hand trick for trigonometry?

• It is not reliable

• It is only for advanced learners

• It requires no calculator

• It is a complex method