Teaching DSSSB PGT Mock Test 2025 Engineering Mathematics Complex Variables

Imaginary part of \(\cos ^{-1}\left(\frac{3-2 i}{3+2 i}\right)\) = ______ 

1
\(y =log[ \sqrt{(\frac{25}{13})} + i\sqrt{\frac{12}{13}}]\)
2
\(y =log[ \sqrt{(\frac{1}{13})} - i\sqrt{\frac{12}{13}}]\)
3
log 7
4
log √7
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