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Anna71 [15]
1 year ago
12

If i- -1, what is the value of ; 3? -1 O i 0 1 0 -

Mathematics
1 answer:
Whitepunk [10]1 year ago
5 0
i=\sqrt[]{-1}\begin{gathered} i^2=(\sqrt[]{-1})^2 \\ i^2=-1 \end{gathered}\begin{gathered} i^3=i^2\times i \\ i^3=-1\times i \\ i^3=-i \end{gathered}

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Find the exact value of COS 300°
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Answer:

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7 0
3 years ago
Mark bought a notebook for $1.45 and some pencils for $0.42 each. If the total cost was $6.91, how many pencils did he buy?
Lesechka [4]
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Okay, we know that Mark brought 1 notebook and the totally is 6.91 while one pencil costs $0.42.

x= number of pencils he brought.
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So the equation will be:

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5 0
3 years ago
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7 0
3 years ago
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8 0
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Answer:

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3 0
3 years ago
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