\(\left(2 \cos ^2 \theta-1\right)\left[\frac{1+\tan \theta}{1-\tan \theta}+\frac{1-\tan \theta}{1+\tan \theta}\right]\) નું મૂલ્ય શું છે?

1
2
2
0
3
\(\frac{\sqrt{3}}{2}\)
4
1

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