Respuesta :

In this case we need the cos function:

[tex]\cos x=\frac{21}{25}=0.84[/tex]

Now we use the inverse function of cos:

[tex]\begin{gathered} x=\cos ^{-1}0.84 \\ x=32.86 \end{gathered}[/tex]

So the angle x is 32.9 degrees

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