Adjusting from cookbook math

[CGiuliano]

Hey again :deadhorse:

So, I have a solution, but something is seriously off. If anyone gets a chance please correct any logical errors you may come across.

Thank you.

Ok, so I estimated cos u > .995 for 0<= t <= .1.
Then, I set up the difference form of the triangle inequality:
|1/2*cos (t) + 1/4*cos(2t)+..+1/2^k*cos(kt)|

>= |1/2||cos(t)| - |1/4||cos(2t)|-..-|1/2^k||cos(kt)|.

>=1/2*.995 - 1/4*.995-...-1/2^k*.995 (for 0 <= t <= .1)

>=.7 ????--> (this is supposed to be my conclusion, but clearly this step is not true, or am I not seeing something).

Thanks again.

 

[Felix]

it is: NO HABLO ESPA‘OL
which is not precise, should be
NO HABLO CASTELLANO

I don't know any native Spanish speaker that says "castellano" instead of "espa~nol", besides a few Spaniards, mostly ones not coming from Castilla.

 

[alain]

Felix, I was going to say something a little bit harsher but you put it nicely.

 

[Andy Nguyen]

Lesson of the day:
Only use English (the proper one) in a multi-cultural environment such as Quantnet