cos(π/12)cos(5π/12)=
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cos(π/12)cos(5π/12)=
cos(π/12)cos(5π/12)=
cos(π/12)cos(5π/12)=
cos(π/12)cos(5π/12)=0.25
cos(π/12)cos(5π/12)=
cos(π/12)cos(5π/12)=
cos(π/12)cos(5π/12)=
cos(π/12)cos(5π/12)=0.25