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[" 109.If "tan A=n" tan "B" and "sin A=m...

[" 109.If "tan A=n" tan "B" and "sin A=m sin B," then "cos^(2)A],[" is equal is: "],[[" A."(m^(2)+1)/(n^(2)-1)," B."(m^(2)-1)/(n^(2)+1)],[" C."(m^(2)-1)/(n^(2)-1)," D."(n^(2)-1)/(m^(2)-1)]]

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