2025 · Q42
[The exact question text could not be verified from available sources]
Elementary MathematicsTrigonometry
- Amn-1=0
- Bmn+1=0
- Cm+n=0
- Dm-n=0
Explanation
The stem could not be recovered (options mn-1=0, mn+1=0, m+n=0, m-n=0). The stored key D (m-n=0) agrees with the published coaching key (PW, CDS 2 2025 Set A). Note: key disputed - independent verification inconclusive.