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Всем привет! Я русская девушка, которая любит Бога и всегда будет
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So then sin - theta + pi = sin theta cos - theta + pi = cos -theta ok then I can just simply add pi to it to change it's sign (positive or negative) just like I could with anything without changing it's value???? so we can just simply add pi to theta
so then I can state this? for sin (theta) I can add pi to theta and still get the same answer??? this would appear to be true does this also hold true for cosine and tangent?
will I do that on my calculator and get the same answer so I guess it's some kind of property of sin...???
ok then everything makes sense you just added pi to make it positive and then everything else makes perfect sense but allows you just to add pi to make it positive?

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