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# Isaac Physics question watch

1. Hey guys, I'm stuck on this question on Isaac physics which asks you to rearrange the equation x=Acos(2πft+ϕ)to make t the subject. No matter what i try i still get it wrong 😐😐😐 help me please xD
2. I did this.
X=Acos(2πft+ϕ)
X/A=cos(2πft+ϕ)
arccos(X/A)=2πft+ϕ
(arccos(X/A)-ϕ)/2πf = t
don't know if its right, did we do the same? also sorry I really need to learn how to use LaTex
3. (Original post by lowkey-loki)
I did this.
X=Acos(2πft+ϕ)
X/A=cos(2πft+ϕ)
arccos(X/A)=2πft+ϕ
(arccos(X/A)-ϕ)/2πf = t
don't know if its right, did we do the same? also sorry I really need to learn how to use LaTex
Thank you!! Yes it's right and don't worry it's fine ^^

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