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# Unit 4: Module 4: Trigonometry

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## About this unit

"This module revisits trigonometry that was introduced in Geometry and Algebra II, uniting and further expanding the ideas of right triangle trigonometry and the unit circle. New tools are introduced for solving geometric and modeling problems through the power of trigonometry. Students explore sine, cosine, and tangent functions and their periodicity, derive formulas for triangles that are not right, and study the graphs of trigonometric functions and their inverses." Eureka Math/EngageNY (c) 2015 GreatMinds.org

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### Practice

- Trig values of special anglesGet 3 of 4 questions to level up!

### Learn

### Practice

- Using the trig angle addition identitiesGet 3 of 4 questions to level up!
- Find trig values using angle addition identitiesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

### Learn

### Practice

- Solve triangles using the law of sinesGet 3 of 4 questions to level up!
- Solve triangles using the law of cosinesGet 3 of 4 questions to level up!
- General triangle word problemsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

### Learn

### Practice

- Evaluate inverse trig functionsGet 3 of 4 questions to level up!
- Solve sinusoidal equations (basic)Get 3 of 4 questions to level up!
- Solve sinusoidal equationsGet 3 of 4 questions to level up!
- Sinusoidal models word problemsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

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