Why for a small q can you say cos q = 1 – ½q^2. os there a derivation or is this just induction

Question

Why for a small q can you say cos q = 1 – ½q^2. os there a derivation or is this just induction>

anonymous · Answer

do your own hw -_-

mertsj · Answer

Why did you repost this question?

anonymous · Answer

this isn't homework :P. because i'm looking for a derivation.

anonymous · Answer

is this just intuitive or is there a proof behind it, and what method would i use to prove it?

anonymous · Answer

do it by yourself :)

anonymous · Answer

^ i don't think you were here when someone asked 20 questions about systems. _that_ was homework.

anonymous · Answer

At least people answer . unlike you :)

anonymous · Answer

i answer :P. you're just not on here at 2 am

anonymous · Answer

anonymous · Answer

people don't answer yours :)

anonymous · Answer

Lol. I have a life so i'm out have fun in open study . 


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