Among the statements :
I: If 1cosαcosβcosα1cosγcosβcosγ1=0cosαcosβcosα0cosγcosβcosγ0, then cos2α+cos2β+cos2γ=23, and
II : If x2+x2x2+3x−1x2+2x+3x+13x2x−1x−23x−32x−1=px+q, then p2=196q2,
Held on 23 Jan 2026 · Verified 6 Jul 2026.
only II is true
both are false
both are true
only I is true
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