sin(5π/12)=
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解
sin(5π/12)
=sin(π/4+π/6)
=sinπ/4cosπ/6+sinπ/6cosπ/4
=√2/2(√3/2+1/2)
=(√6+√2)/4
sin(5π/12)
=sin(π/4+π/6)
=sinπ/4cosπ/6+sinπ/6cosπ/4
=√2/2(√3/2+1/2)
=(√6+√2)/4
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