Respuesta :

vedsoni1996

Answer:

Step-by-step explanation:

We can use the identity:

[tex]sin^{2}A + cos^{2}A= 1[/tex]

[tex]sinA = \frac{21}{29}[/tex]

Solving we get,

cosA = 20/29

Answer:

C. 20/29

e2020

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