Answer :

Answer:

36.

Step-by-step explanation:

sec^2 (π/9) = 1 / cos^2 (π/9) = 1.13247

sec^2 (2π/9) = 1 / cos^2 (2π/9) = 1.70409

sec^2 (4π/9) = 1 / cos^2 (4π/9) = 33.1634

Adding these gives us  36 to the nearest whole number

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