Hemaylar1ieJespir Hemaylar1ieJespir

19-11-2016
Mathematics

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find the exact value of tan22.5 using the half angle formula.

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nobillionaireNobley nobillionaireNobley

22-11-2016

tan(a/2) = sin a / (1 + cos a)
tan(45/2) = sin(45) / (1 + cos(45)) = (1/√2) / (1 + 1/√2) = (1/√2) / (√2 + 1)/√2 = 1/(√2 + 1) = (√2 - 1)

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mrmcutiecat mrmcutiecat

14-02-2020

Answer:

C on Edge

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I got it right on the test

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