Respuesta :

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Remember SOH CAH TOA
sin=opposite/hypotenuse
cos=Adjacent/Hypotenuse
Tan=Opposite/Over Adjacent

So from the problem:
Sin=15/17
which by SOH CAH TOA means cos = x/17
because this is a right triangle you can do:
[tex] \sqrt{17^{2}-{15^{2}=x [/tex]

so cos = [tex] \sqrt{17^{2}-{15^{2}/17 [/tex]

Answer:

cos (theta) = +/- 8/17

Step-by-step explanation:

Use the definition of cosine to find the value of cos (theta)

cos (theta)=adj/hyp

Substitue in the known values

cos (theta)=+/- 8/17

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