Question

What is the value of sec 4π/3?

A) 2 B) -2 C) 2/√3 D) -2/√3

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

sec Ф = 1 / cos Ф

sec 4π/3 = 1 / cos 4π/3

              = 1 / cos  ( π + π/3 )

              = 1/ (-1 / 2 )

              = -2