Are trig functions polynomial fuctions?

AI Thread Summary
The discussion centers on whether the expression 3cos(22x) + cos(x^2) - 1 qualifies as a polynomial function. It is noted that while the function can be expressed as a quartic in cos(x), it does not meet the criteria for a polynomial in x unless infinite degree polynomials are permitted. The original poster (OP) is criticized for not demonstrating an understanding of the question. The conversation also includes light-hearted banter about the OP's lack of effort and the context of the post being the 1000th contribution of a participant. Overall, the main focus is on the classification of the function in question.
zeion
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Homework Statement



Is 3cos22x + cosx2 - 1 a polynomial function?


Homework Equations





The Attempt at a Solution

 
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zeion said:

Homework Statement



Is 3cos22x + cosx2 - 1 a polynomial function?


Homework Equations





The Attempt at a Solution


What is the definition of "a polynomial function"?
 
Well, this function can be arranged to a quartic in cos(x). As a polynomial in x, however, it's only a polynomial if you allow polynomials of infinite degree.
 
And so, the OP gets a free answer with no attempt at the solution and no indication that he even understands the question. :rolleyes:
 
stevenb said:
And so, the OP gets a free answer with no attempt at the solution and no indication that he even understands the question. :rolleyes:

Agh, my bad my bad. Think I should delete or has he already seen it?
 
Char. Limit said:
Agh, my bad my bad. Think I should delete or has he already seen it?

:wink: Well, it happened on your 1000th post, so you earned a get out of jail free card, and we have to let it go.
 
I already saw it HAHAHA
 

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