How do you find the amplitude and period of #y=-2cos(4t)#?

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Answer 1 · 2018-04-21T17:47:33

the answer below

show the explanition

#y=a*cos(wt)#

the amplitude is

#a=-2 m#

#w=2pif#

#f=1/t#

#w=(2pi)/t#

#t=(2pi)/w#

#t=(2pi)/4=pi/2=1.571 s#