The video tutorial covers the process of evaluating trigonometric functions for a given angle, specifically five π/4. It begins with setting up the angle and identifying the reference angle. The tutorial then explains how to find the reference points on the unit circle and apply the correct signs based on the quadrant. The instructor evaluates the cosine, sine, and tangent functions, and discusses the reciprocal functions, secant and cosecant, emphasizing the importance of understanding their relationships. The session concludes with clarifications on handling negative values and addressing student questions.

What is the reference angle for an angle of 5π/4?

• π/4

• π/2

• π/3

• π/6

In which quadrant are both coordinates negative?

• Second quadrant

• Third quadrant

• Fourth quadrant

• First quadrant

What is the cosine of 5π/4?

• Square root of 2 / 2

• -Square root of 2

• -Square root of 2 / 2

• Square root of 2

How is the secant function related to the cosine function?

• Secant is the reciprocal of cotangent

• Secant is the reciprocal of sine

• Secant is the reciprocal of tangent

• Secant is the reciprocal of cosine

What is the final value of the cosecant of an angle if the sine is negative?

• Positive

• Negative

• Undefined

• Zero