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What is the measure of ZA in terms of/ and m?АCnBΖΑ

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Cos (alpha) = l/m

mA = Cos^-1(l/m)

What is the measure of ZA in terms of/ and m?АCnBΖΑ-example-1
What is the measure of ZA in terms of/ and m?АCnBΖΑ-example-2
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