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Half angle formula for cosB

Half angle formula for cosB
asked 106k views
3 votes
Half angle formula for cosB

Half angle formula for cosB-example-1
asked
User Jay Somedon
by
7.7k points

1 Answer

1 vote

the half angle identity for cosine is

cos (
(B)/(2)) = ±
√((1+cosB)/2)


answered
User Casolorz
by
8.0k points
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