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The principal value of $\;tan^{-1}(cot \large\frac{43 \pi}{4})\;$ is :

$(a)\;-\large\frac{3 \pi}{4}\qquad(b)\;\large\frac{3 \pi}{4}\qquad(c)\;-\large\frac{ \pi}{4}\qquad(d)\;\large\frac{ \pi}{4}$

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