timmy6738282 timmy6738282

29-07-2020
Mathematics

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unicorn3125 unicorn3125

31-07-2020

Answer:

18.3

Step-by-step explanation:

from cosines theorem:

t² = 11² + 14² - 2•11•14•cos87°

t² = 121 + 196 + 308•0.05236

t² = 333.12688

t = √333.12688

t = 18.2517... ≈ 18.3

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