Solve tan(π4+12cos−1ab)+tan(π4−12cos−1ab)

1.	Solve tan(π4+12cos−1ab)+tan(π4−12cos−1ab)
Answer» Solve $t a n (\frac{π}{4} + \frac{1}{2} c o s^{- 1} \frac{a}{b}) + t a n (\frac{π}{4} - \frac{1}{2} c o s^{- 1} \frac{a}{b})$

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