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# AP Precalculus Unit 3: Periodic Phenomena

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@SignificantDjinn

θ=s/r

### What is the name given to angles that share the same starting and ending positions but have different measures?

Coterminal angles

### What is the ratio of side lengths for a 45°-45°-90° triangle?

<p>1:1:1 times square root of 2</p> Signup and view all the answers

### What is the range of values on the y-axis for the sine and cosine functions?

<p>[-1,1]</p> Signup and view all the answers

### What is the purpose of special triangles on the unit circle?

<p>To aid in evaluating trigonometric functions with exact ratios</p> Signup and view all the answers

### What is the definition of periodic phenomena?

<p>Occurrences or relationships that display a repetitive pattern over time or space</p> Signup and view all the answers

### What is the period of a periodic function?

<p>The gap between repetitions of the function</p> Signup and view all the answers

### What is the definition of an interval of increase?

<p>A set of x-values from the lower to the maximum point</p> Signup and view all the answers

### What is the definition of concavity?

<p>When the rate of intervals of increase/decrease is changing</p> Signup and view all the answers

### What is an angle in standard position?

<p>An angle with its initial side parallel to the positive x-axis and its vertex at the origin</p> Signup and view all the answers

### What is the average rate of change of a function?

<p>The change in output divided by the change in input</p> Signup and view all the answers

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