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Yuki888 [10]
3 years ago
15

Use a half-angle formula to find the exact value of the expression.

Mathematics
1 answer:
NARA [144]3 years ago
5 0

Step-by-step explanation:

The answer is

\sqrt{2}  - 1

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If 2 1/2 posterboard is enough for 1/2 of the project, it will take another 2 1/2 posterboard to display the other half of the project.

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