Objective Type Question:

If $ \alpha,\beta $ are the solution of $ a tan\theta+ b sec\theta=c $, then $ tan(\alpha+\beta)= $
a)$ \frac{2ac}{a^2-c^2} $
b)$ \frac{2ac}{c^2-a^2} $
c)$ \frac{2ac}{c^2+a^2} $
d)None of these

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