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Evaluate w/o using a calulator: sec (11 pi/6)
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3 votes
Evaluate w/o using a calulator:
sec (11 pi/6)

User John Nguyen
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1 Answer

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sec ( 11π/6 ) = 1/ cos ( 11π / 6 ) = 1 / cos ( 2π - π/6 ) =
= 1 / cos ( - π/6 ) = 1 / cos ( - 30°) = 1 / cos 30° = 1 / √3/2 =
(2)/( √(3) ) = (2 √(3) )/(3)
User Nikola Hristov
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