If \( \tan ^{-1} 2, \tan ^{-1} 3 \) are angles of a triangle then the third angle is (a) \( \fra...

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If \( \tan ^{-1} 2, \tan ^{-1} 3 \) are angles of a triangle then the third angle is
(a) \( \frac{\pi}{4} \)
(b) \( \frac{3 \pi}{4} \)
(c) \( \frac{\pi}{2} \)
(d) none of these
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