Cos(pi/2 - x) = sin(x). sec(x) = 1/cos(x), so the left side would be sinx/cosx = tanx. So it checks out.
Answer:
Explanation:
In modern times me may see color film or modernized clothing.
It is to inform on how life was like back then.
Answer:
that would be volunteer bias because that would negatively affect our study.
Answer:
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Explanation:
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