Evaluate the sine, cosine, and tangent for an angle using special right triangles

The video tutorial covers the basics of trigonometric functions, focusing on sine, cosine, and tangent. It explains how to identify π/4 and its position in the first quadrant, equating it to 45 degrees. The tutorial discusses the 45-45-90 triangle relationships and demonstrates how to calculate sine, cosine, and tangent for π/4. Finally, it verifies these calculations using the unit circle, emphasizing the relationship between trigonometric functions and coordinates.

What is the equivalent degree measure of π/4?

• 30 degrees

• 90 degrees

• 45 degrees

• 60 degrees

In a 45-45-90 triangle, what is the ratio of the sides?

• 1:√3:2

• 1:1:1

• 1:2:√3

• 1:1:√2

What is the sine of π/4?

• 1

• 0

• 1/2

• √2/2

How is the cosine of an angle related to the unit circle?

• It is the Y coordinate

• It is the X coordinate

• It is the hypotenuse

• It is the tangent

What is the tangent of π/4?

• 0

• 1

• 2

• √2