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dimaraw [331]
3 years ago
5

Finding exact value using half angle identities Why is my answer incorrect?

Mathematics
1 answer:
Anton [14]3 years ago
6 0

Step-by-step explanation:

Your mistake is here: cos(-45°) = +½√2, not -½√2.

±√((1 + ½√2) / 2)

= ±√((2 + √2) / 4)

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