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# Unit 3: Trigonometric functions

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Unit test

### Learn

### Practice

- Plotting angles on unit circleGet 3 of 4 questions to level up!
- Sign of trigonometric functionsGet 3 of 4 questions to level up!
- Trig values of special anglesGet 3 of 4 questions to level up!

### Learn

### Practice

- Trigonometric functions of sum and difference of anglesGet 3 of 4 questions to level up!
- Sum and difference of trigonometric functionsGet 3 of 4 questions to level up!
- Evaluate trigonometric expressions (intermediate)Get 3 of 4 questions to level up!

### Learn

### Practice

- Use the Pythagorean identityGet 3 of 4 questions to level up!
- Principal solutions of trigonometric equationGet 3 of 4 questions to level up!
- General solution of trigonometric equationGet 3 of 4 questions to level up!

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