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KarryPeckinpaugh560 KarryPeckinpaugh560
  • 23-05-2015
  • Mathematics
Answered

Find the exact value. Sec^2(11pi/6)

Verified Answer :

IranianWithUranium IranianWithUranium
  • 23-05-2015

1 + tan^2(11pi/6)
1 + tan^2(2pi - pi/6)
1 + tan(2pi - pi/6)tan(2pi - pi/6)

tan(2pi) = 0
tan(pi/6) = 1/sqrt(3)

Compund angle rule:

1 + sqrt(3)/3  sqrt(3)/3
1 + 1/3
4/3

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