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22-09-2019
Mathematics

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Аноним Аноним

23-09-2019

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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