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7.8 Sinusoidal Graphs. Graph of y = sinx Period = 2 Amplitude = max – min = 1 – – 1 = 1 2 x y 1 –1.

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Presentation on theme: "7.8 Sinusoidal Graphs. Graph of y = sinx Period = 2 Amplitude = max – min = 1 – – 1 = 1 2 x y 1 –1."— Presentation transcript:

1 7.8 Sinusoidal Graphs

2 Graph of y = sinx Period = 2 Amplitude = max – min = 1 – – 1 = 1 2 x y 1 –1

3 General Sine Curve If a is (+), typical sine curve If a is (–), reflect through x-axis We’ll do c & d tomorrow

4 Ex 1) Graph y = 3sinx b c a d Amp = 3 Period = 2 Increment length = 1 = 0 = 3 = 0 3 –3

5 Ex 2) Graph y = sin2x b c a d Amp = 1 Per: IL: = 2 = 0 = 1 = 0 1 –1

6 Graph of y = cosx Period = 2 Amplitude = max – min = 1 – – 1 = 1 2 x y 1 –1

7 General Cosine Curve If a is (+), typical cosine curve If a is (–), reflect through x-axis We’ll do c & d tomorrow

8 Ex 3) Graph b c a d Amp = 2 Per: IL: = = 0 = –2 = 0 2 –2 a = –2  reflect across x-axis

9 Homework #720 Pg – 4 all, 13 – 20 all


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