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  • 26-03-2022
  • Mathematics
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FIRST CORRECT GETS BRAINLIEST

FIRST CORRECT GETS BRAINLIEST class=

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Аноним Аноним
  • 26-03-2022

Answer:

First choice.

Step-by-step explanation:

cos 11π/6 = cos π/6 = √3/2

So cos 11π/12 =   √(1 + cos 11π/6) / √2

= √(1 + √3/2) / √2

= √(2 + √3) / 2.

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