Evaluate: cos(Arctan 15/8)

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asked Apr 6, 2017 151k views

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Evaluate: cos(Arctan 15/8)

Mathematics
high-school

Iesus Sonesson asked

by Iesus Sonesson

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cos(arctan 15/8) = cos(arccos 8/sqrt(15^2 + 8^2)) = 8/sqrt(225 + 64) = 8/sqrt(289) = 8/17 = 0.4706

Vorathep Sumetphong answered Apr 11, 2017

by Vorathep Sumetphong

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