MCQ
In a ΔABC if 2 cos C = sin B · cosec A, then ______.
- ✓a = c
- Ba = b
- Ca = b = c
- Db = c
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(II) $\ce{P + Zn ->[\Delta] Q}$
(III) $\ce{P ->[Na2Cr2O7][H2SO4] R}$
Q and R are respectively: