kallale464 kallale464

20-04-2020
Mathematics

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

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

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MathPhys MathPhys

20-04-2020

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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