Find exact value of sec^-1 (2 sqrt3/3)

[From: ] [author: ] [Date: 12-02-12] [Hit: ]

sec^-1 (2√3/3)
1 / sec^1 (2√3/3)
1 / sec (2√3/3)
1 / (1/cos(2√3/3))
cos (2√3/3)
Use a calculator to find that.

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