Using co function identities find the value of an angle

The video tutorial covers the unit circle, focusing on key points at 30, 45, and 60 degrees. It explains cofunction identities, demonstrating how sine and cosine relate to each other. The tutorial also discusses secant and cosecant functions, followed by an exploration of tangent and cotangent. The session concludes with a review and addresses student questions.

What are the coordinates for 45 degrees on the unit circle?

• Square root 3 / 2, 1/2

• Radical 2 / 2, Radical 2 / 2

• 1, 0

• 1/2, Square root 3 / 2

Which identity shows the relationship between sine of 30 degrees and cosine of 60 degrees?

• Sine of 30 degrees equals cosine of 90 degrees

• Sine of 30 degrees equals cosine of 60 degrees

• Cosine of 30 degrees equals sine of 60 degrees

• Sine of 60 degrees equals cosine of 30 degrees

What is the secant of 120 degrees equivalent to?

• Secant of 60 degrees

• Secant of 30 degrees

• Cosecant of 30 degrees

• Cosecant of -30 degrees

What is the result of tangent of 60 degrees?

• 1

• Square root 3 / 2

• Square root 3

• 1/2

How is cotangent of 30 degrees calculated?

• 1 over tangent

• X over Y

• 1 over sine

• Y over X