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30-03-2020
Mathematics

contestada

If If sinx=13 find cosx. Hint: use the pythagorian identity.

13

19

22√3

89

Respuesta :

amna04352 amna04352

31-03-2020

Answer:

[2√2]/3

Step-by-step explanation:

cos²x = 1 - sin²x

cos²x = 1 - (⅓)² = 8/9

cos x = sqrt(8/9)

= [2√2]/3

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