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Is-cosh-2-3x-1-2-1-cos-6x-




Question Number 17279 by tawa tawa last updated on 03/Jul/17
Is  cosh^2 (3x) = (1/2)[1 + cos(6x)]  ??????
Iscosh2(3x)=12[1+cos(6x)]??????
Commented by mrW1 last updated on 03/Jul/17
cosh^2  3x=(((e^(3x) +e^(−3x) )/2))^2   =((e^(6x) +e^(−6x) +2e^(3x) e^(−3x) )/4)  =((e^(6x) +e^(−6x) +2)/4)  =(1/2)(((e^(6x) +e^(−6x) )/2)+1)  =(1/2)(cosh 6x+1)
cosh23x=(e3x+e3x2)2=e6x+e6x+2e3xe3x4=e6x+e6x+24=12(e6x+e6x2+1)=12(cosh6x+1)
Commented by tawa tawa last updated on 03/Jul/17
Commented by tawa tawa last updated on 03/Jul/17
I really appreciate sir. God bless you.
Ireallyappreciatesir.Godblessyou.

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