19. is equal to
(A)
(B)
(C)
(D)
As we know that if and is principal value range of .
In this case ,
hence we have then,
Hence the correct answer is (B).
Board Exam Date Sheet 2025: CBSE, UPMSP, MPBSE, Class 10, 12 board exam dates out; BSEB, CGBSE schedules soon
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CBSE Class 12 board exam date sheet 2025 out; exams from February 15 to April 4
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