State the amplitude and the period of .
Answer and explanation
Correct answer: A. amplitude 3, period 180 degrees
- Step 1: The amplitude is the coefficient of the sine: . Step 2. The period of is . Answer: amplitude 3, period 180 degrees. Why not the others: amplitude 4, period 720 degrees: That mixes up the amplitude with other numbers and multiplies the period by 2. amplitude 2, period 180 degrees: That uses the coefficient of as the amplitude. amplitude 3, period 360 degrees: That ignores the coefficient of in the period.
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