A 1000 milligrams
or
1 gram.
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You can look up "trigonometric identities" in Wikipedia.Cos(2x), among other things, is equal to (cos x)^2 - (sin x)^2 If you meant cos squared x, or (cos x)^2, that is equal to (1 + cos(2x))/2
It is x*sqrt(x) or x^(3/2)
If: 6x = 12 Then: x = 2
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