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Mathematics
Rhianna Decker
3 March, 18:22
How does A compare to B a=cos (0+2pi) b=cos (-0)
+4
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1
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Ashlyn Welch
3 March, 20:52
-1
You can use the double angle formula for A.
Cos (0 + 2pi) = Cos (0) * Cos (2*pi) - Sin (0) * Cos (2*pi)
Cos 0 = 1
Cos (2*pi) = 1
Sin (0) = 0
So you are left with cos (0 + 2pi) = 1 * 1 = 1
there are a couple of ways of handling Cos (-0)
The First and most obvious way is to put it in your calculator just as you see it. Most calculators would do it like this
Cos (
+/-
0
)
=
The result should be 1
You could try using cos (0-0) You will get the same answer - - 1.
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