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Amplitude and Period of Sine and Cosine. Section 6.4. Periodic Functions. Functions are periodic when they have intervals that repeat themselves The interval that repeats itself is called the period . The Goal:.
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Amplitude and Period of Sine and Cosine Section 6.4
Periodic Functions • Functions are periodic when they have intervals that repeat themselves • The interval that repeats itself is called the period.
The Goal: • In this section we will perform transformations using sine and cosine as our parent function.
Amplitude • The amplitude of the function y = A sin x and y = A cos x is the absolute value of A, or |A|.
Example • State the amplitude: • Y = 1/6 cos x • Y = -2 sin x
Period • The period of the function y = A sin k x and y = A cos k x is 2π/|k|.
Example • State the period: • Y= cos ½ x • Y= sin 3x