Homework Help: trig

Posted by kikine on Wednesday, February 13, 2013 at 12:51am.

Given the function y = 3cos(3x + pi), identify:
Amplitude (if applicable, give the answer in fractional form)

Period (in radians as a multiple of pi - note: do not write "rad" or "radians" in your answer)

Phase Shift (if the shift is right, enter + and if to the left, enter - before the number; if none, enter the number zero)

trig - Reiny, Wednesday, February 13, 2013 at 9:26am
y = 3cos(3x + pi)

y = 3cos 3(x + π/3)

amplitude : 3
period = 2π/3

phase shift: π/3 to the left

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