What is the amplitude of y= -8 cos 2ө?
A. -1/2
B.-2
C.8
D.-8
Update:NOTE : For A the choice was actually 2 not -1/2 i typed it incorrectly
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A. -1/2
B.-2
C.8
D.-8
Update:NOTE : For A the choice was actually 2 not -1/2 i typed it incorrectly
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Verified answer
C. Amplitude is never negative, it is always the absolute value of the number. The amplitude is always the "A" of the function, or the number that multiplies into the rest of the function (usually put in front).
The answer is C 8
The absolute value of the number in front of cos or sin is the amplitude for
a sinusoidal function