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#1 Re: Help Me ! » First year maths » 2016-08-11 03:13:41

N1

Thank you everyone.
I found the answer.
Cos^3x=(cos3x +3cosx)/4
1/4 cos3x +3/4 cosx
[yn(nth derivative of y)=a^n cos{ax+b+(nπ/2)}]
.

#2 Help Me ! » First year maths » 2016-08-10 01:37:55

N1
Replies: 4

Using the nine yn rules only. Differentiate cos^3x n times

#3 Guestbook » Everything » 2016-08-10 01:31:44

N1
Replies: 1

Everything makes sense until you think about it.

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