Question

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


13

19

22√3

89

Answer 1

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