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nata0808 [166]
3 years ago
13

Please show your work/explain. thank you so much <3

Mathematics
1 answer:
Jlenok [28]3 years ago
5 0

Answer:

cos A =  12/13

Step-by-step explanation:

TanC = AB/BC = 2.4

therefore

BC = AB/2.4

Pythagorean theorem

AC = √(AB² + (AB/2.4)²) = (13/12)AB

Cos A = AB/AC = AB / (13/12)AB = 12/13

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