Talk:Cosine of Sum/Proof 3

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Please tell me what, specifically, needs to be brought “in accordance with main page variable use, minor TeX house style”. I read through Help:Editing/House Style but can’t really see what’s wrong. — Timwi (talk) 15:01, 13 December 2012 (UTC)

The "main page" Cosine of Sum uses $a$ and $b$, while this proof uses $x$ and $y$. This is what I meant. --Lord_Farin (talk) 15:02, 13 December 2012 (UTC)
Same for Sine of Sum. --Lord_Farin (talk) 15:03, 13 December 2012 (UTC)
Ah, OK. I’ll get to that in a moment. — Timwi (talk) 15:44, 13 December 2012 (UTC)