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plz help me with the attcahment below

Plz Help Me With The Attcahment Below class=

Answer :

Step-by-step explanation:

...............MaRk As BrAiNeSt

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Answer:

cos theta = BC/AC

Step-by-step explanation:

The cosine function is the ratio of the length of the adjacent side of one of the angles of a triangle to the length of the hypotenuse:

cos theta = BC/AC