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Simplification
If tanA + tanB = X, then the value of X is
(tanA - tanB)/(1 + tanAtanB)
(tanA + tanB)/(1 - tanAtanB)
(tanA + tanB)/(1 + tanAtanB)
(tanA - tanB)/(1 - tanAtanB)
Correct Answer:
(tanA + tanB)/(1 - tanAtanB)
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