How to do this problem?

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1 Answer
Sean
Dec 5, 2017

#x=9,21,-3,33,-15,45,-27,.....#

Explanation:

.
#y=sin((pix)/6)+1#

#sin((pix)/6)+1=0#

#sin((pix)/6)=-1=sin((3pi)/2)=sin((3pi)/2+-2npi)#

#(pix)/6=(3pi)/2+-2npi#

#(cancelcolor(red)pix)/6=(3cancelcolor(red)pi)/2+-2ncancelcolor(red)pi#

#x/6=3/2+-2n#

#x=9+-12n#

where #n=0,1,2,3,4,................#

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