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1 June, 01:24

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

13

19

22√3

89

+5
Answers (1)
  1. 1 June, 03:52
    0
    [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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