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GoddessofDork

Remember "SOH CAH TOA"


Sine = (Opposite/Hypotenuse)

Cosine = (Adjacent/Hypotenuse)

Tangent = (Opposite/Adjacent)


In this case, we will be using cosine, and our equation will be [tex] \frac{cos(28)}{1} =\frac{11}{x} [/tex]


So firstly, cross-multiply. [tex] cos(28)*x=11 [/tex]


Next, divide both sides by cos(28), and your answer will be [tex] x=12.5 [/tex]

david8644

Answer:

a.)12.5

Step-by-step explanation:

You have a triangle with a 90º angle, you can apply the laws of the triangles on the triangle, and the chosen would be cosine.

Cosine=[tex]\frac{side-adjacent}{Hypotenuse}[/tex]

Cosine 28º= [tex]\frac{11}{x}[/tex]

x=[tex]\frac{11}{cosine 28}[/tex]

x= [tex]\frac{11}{.8829}[/tex]=12.45

x=12.5

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