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Answered

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ΔABC has three sides with these lengths: AB = 9, BC = 40, and CA = 41. What is the value of cos C?

Sagot :

Answer:

m ∠ C = 12.68°

Step-by-step explanation:

CA = 41 is the hypotenuse of the right triangle.

 BC = 40 is adjacent to angle C.

Cos C = adjacent/hypotenuse

Cos ∠C =  40/41

[tex]cos^{-1}[/tex](40/41) = 12.68°

Check

cos (12.68) = x/41

)cos 12.68) x 41 = 40 check

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