**Trigonometic Funtions Part 1**

*Radian*

**Measures**- 2radians = 360 degrees, radians = 180 degrees
- to convert degrees to radians, multiply degree by (/180)
- to convert radians to degrees, multiply radians by (180/)

*Special Angles*

- you can use the unit circle to solve
- use special angles with unit circle

*Equivalent Trigonometric Expressions*

*Compond Angle Formula*

- apply equivalent trigonometric expressions to compund angle formula
- determine exact trigonometric ratios for angles expressed as sums or differences or special angles

*Identities*

- treat each side independantly and transform expression on one side into exact form of the other

**Trigonometric Functions Part 2**

*Sine, Cosine, and Tan Graphs*

- y=sinx and y=cosx graphs have amplitude of 1 and a period of 2 and can be transformedy=tanx has no amplitude and no maximum or minimum

*Reciprocals*

- reciprocals are different from it's inverse
- csc means 1/sinx
- sec means 1/cosx
- cot means 1/tanx

*Mapping Rule*

- g(x) = af [k(x-d)] + c
- a represents amplitude
- d represents phase shift
- c respresents vertical translation

*Period*

*Amplitude*

- max - min / 2

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