sin(π/4)=cos(π/4)=(√2)/2 , ctg(π/3)=(√3)/3
(√2)/2 × (√2)/2 × (√3)/3=(√2)(√2)(√3)/(2×2×3)=(2√3)/12=(√3)/6
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sin(π/4)=cos(π/4)=(√2)/2 , ctg(π/3)=(√3)/3
(√2)/2 × (√2)/2 × (√3)/3=(√2)(√2)(√3)/(2×2×3)=(2√3)/12=(√3)/6