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4.5 Graphs of Sine and Cosine Functions AmplitudePeriodTranslations

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The graph of f(x)=sin x Domain all Real numbers Range -1 to 1

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The graph of f(x)=sin x Sin x is an odd function

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Graph of f(x) = -sin x

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Graph of the f(x) = Cos x Domain: All real numbers Range: -1 to 1

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Graph of the f(x) = Cos x Cos x is an even function

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The red graph is Sin and the blue is Cos

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Amplitude changes the Range

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Since Amplitude is a distance, it is always positive. To find it: the absolute value of the Maximum minus the Minimum divide by two. Amp is written before the function y = a*sin x

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Amplitude changes the Range Max 7; Min - 1 Amp.

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Period (wave length) The distance before the function repeats its value. y = sin bx; here b is 1.

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Period (wave length) y = sin 2x b = 2

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Translation to move the graph of the functiony = sin (x + c): moves Right or Left Here is

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Translation to move the graph of the functiony = sin x + d moves up or down Here is

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With all the translations The sine function is f(x) = d + a sin b(x +c) The cosine function is f(x) = d + a cos b(x +c)

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Applet for the Sine function http://www.analyzemath.com/trigonometry/ sine.htm

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Homework Page 307 – 310 #3, 9, 14, 20, 26, 32, 41, 49, 71, 78

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Homework Page 307 – 310 #7, 12, 17, 23, 27, 36, 45, 60, 76, 86

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Periodic Functions. A periodic function is a function f such the f(x) = f(x + np) for every real number x in the domain of f, every integer n, and some.

Periodic Functions. A periodic function is a function f such the f(x) = f(x + np) for every real number x in the domain of f, every integer n, and some.

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