trigonometric function, we can tell from the first one &quot;Sin&quot;, that it means a kind of act that viloates the moral rule.

14 years ago

trigonometric function, we can tell from the first one "Sin", that it means a kind of act that viloates the moral rule.

14 years ago

So WHY should we learn this, i know that it's a useful function, but in fact, most of us might just use it in exams.

14 years ago

加油好嗎?

14 years ago

樓上也是

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