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If A,B and C are the angle of a triangle...

If A,B and C are the angle of a triangle show that
(i) `|{:(sin2A,sinC,sinB),(sinC,sin2B,sinA),(sinB,sinA,sin2C):}|=0.`
(ii) `|{:(-1+CcosB,cosC+cosB,cosB),(cosC+cosA,-1+cosA,cosB),(-1+cosB,-1+cosA,-1):}|=0.`

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