Use cofunction identities and trig identities to find the indicated trig functions

Use cofunction identities and trig identities to find the indicated trig functions

Assessment

Interactive Video

Mathematics, Social Studies

11th Grade - University

Hard

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The video tutorial explains how to solve a trigonometric problem involving the cosine of 60 degrees and the sine of 30 degrees. It introduces the concept of cofunction identities, which state that the cosine of 90 degrees minus an angle is equal to the sine of that angle. The tutorial demonstrates how to apply these identities to find that the cosine of 60 degrees is equal to the sine of 30 degrees, providing a clear method for evaluating trigonometric functions.

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5 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the cosine of 60 degrees and how does it relate to the sine of 30 degrees?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Explain the concept of cofunction identities in trigonometry.

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

What does the equation 'cosine of 90 - angle Theta equals sine of angle Theta' signify?

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

How can you derive the sine of 30 degrees using the cosine function?

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5.

OPEN ENDED QUESTION

3 mins • 1 pt

Discuss how to evaluate trigonometric functions using the relationship between sine and cosine.

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