Trigonometric Functions and Their Values

The video tutorial explains the importance of knowing exact trigonometric values for sine, cosine, and tangent. It covers these values in both degrees and radians, providing a quick method to calculate them using square roots. The tutorial emphasizes the usefulness of these values in simplifying calculations and solving trigonometric problems.

Why is it useful to know the exact values of trigonometric functions?

• To avoid using a calculator

• To make graphs look better

• To solve trigonometric equations more easily

• To impress your friends

What is the sine of 30 degrees?

• √3/2

• 0

• 0.5

• 1

What is the sine of 60 degrees?

• √2/2

• √3/2

• 0.5

• 1

What is the sine of 0 degrees?

• 0

• 0.5

• 1

• √3/2

What is the sine of 90 degrees?

• 0.5

• 0

• 1

• √3/2

What is the cosine of 45 degrees?

• √3/2

• √2/2

• 1

• 0

What is the cosine of 90 degrees?

• 0

• √3/2

• 1

• √2/2

What is the cosine of 0 degrees?

• √3/2

• 0

• 0.5

• 1

What is the cosine of 60 degrees?

• √3/2

• 1

• 0.5

• 0

What is the tangent of 45 degrees?

• Undefined

• √3

• 1

• 0