A 0.21 H inductor and a 12Ω resistance are connected in series to a 220 V, 50 Hz ac…

Mathematics · JEE Main · NTA Exams — Matrices and Determinants

1. \(\tan ^{-1}\left(\frac{7 \pi}{4}\right)\)
2. \(\cos ^{-1}\left(\frac{7 \pi}{4}\right)\)
3. \(\tan ^{-1}\left(\frac{4 \pi}{7}\right)\)
4. \(\cos ^{-1}\left(\frac{4 \pi}{7}\right)\)

Answer

(C) ^ -1 ( 4 7 )

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