Trigonometric Functions and Angles

This video tutorial explains how to determine the exact trigonometric function values using reference triangles. It focuses on finding the six trigonometric function values for an angle of 5π/4 radians. The tutorial covers sketching the angle in standard position, forming the reference triangle, and calculating the sine, cosine, secant, cosecant, tangent, and cotangent values. The video emphasizes working with radians and rationalizing denominators for trigonometric values.

What is the primary focus of the video tutorial?

• Understanding the history of trigonometry

• Learning about the unit circle

• Converting radians to degrees

• Determining trigonometric function values using reference triangles

What is the initial side of the angle in standard position?

• Along the positive Y-axis

• Along the negative Y-axis

• Along the negative X-axis

• Along the positive X-axis

In which quadrant is the terminal side of the angle 5π/4 radians located?

• Second quadrant

• First quadrant

• Third quadrant

• Fourth quadrant

What are the signs of the legs of the reference triangle in the third quadrant?

• One positive, one negative

• Both negative

• Both positive

• Zero

What is the sine of 5π/4 radians after rationalizing the denominator?

• Square root 2/2

• -Square root 2/2

• 1

• -1

What is the cosine of 5π/4 radians after rationalizing the denominator?

• -1

• 1

• -Square root 2/2

• Square root 2/2

What is the secant of 5π/4 radians?

• -1

• 1

• -Square root 2

• Square root 2

What is the cosecant of 5π/4 radians?

• Square root 2

• -Square root 2

• 1

• -1

What is the tangent of 5π/4 radians?

• 0

• 1

• -1

• Undefined

What is the cotangent of 5π/4 radians?

• -1

• 1

• 0

• Undefined