# Trigonometric Functions

• Extend The Domain Of Trigonometric Functions Using The Unit Circle
• F.TF.1
Understand radian measure of an angl...
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• F.TF.2
Explain how the unit circle in the c...
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• F.TF.3
(+) Use special triangles to determi...
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• F.TF.4
(+) Use the unit circle to explain s...
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• Model Periodic Phenomena With Trigonometric Functions
• F.TF.5
Choose trigonometric functions to mo...
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• F.TF.6
(+) Understand that restricting a tr...
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• F.TF.7
(+) Use inverse functions to solve t...
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• Prove And Apply Trigonometric Identities
• F.TF.8
Prove the Pythagorean identity sin2(...
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• F.TF.9
(+) Prove the addition and subtracti...
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### Grade level

• K-2
• 3-5
• 6-8
• 9-12
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### Unit Circle Practice

Practice identifying coordinates, radians, degrees, triangles, and more of the unit circle.

### Fundamental Trigonometric Identities

Read a review and practice proving trig identities.

### Sin, Cos and Tan of Sum and Difference of Two Angles

Prove sum and difference formulas and use them to calculate the values of trig functions.

### Inverse Sine, Inverse Cosine, and Inverse Tangent

Learn about the inverses of trigonometric functions and the necessity of domain restriction.

### Unit Circle Practice

Practice identifying coordinates, radians, degrees, triangles, and more of the unit circle.

### Fundamental Trigonometric Identities

Read a review and practice proving trig identities.

### Sin, Cos and Tan of Sum and Difference of Two Angles

Prove sum and difference formulas and use them to calculate the values of trig functions.

### Inverse Sine, Inverse Cosine, and Inverse Tangent

Learn about the inverses of trigonometric functions and the necessity of domain restriction.

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