(sin2π/3+cos11π/6)tan7π/4=
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(sin2π/3+cos11π/6)tan7π/4=(sin2π/3+cos11π/6)tan7π/4=(sin2π/3+cos11π/6)tan7π/4=(sin2π/3+cos11π/6)tan7
(sin2π/3+cos11π/6)tan7π/4=
(sin2π/3+cos11π/6)tan7π/4=
(sin2π/3+cos11π/6)tan7π/4=
(sin2π/3+cos11π/6)tan7π/4
=[sin(π-π/3)+cos(2π-π/6)]*tan(2π-π/4)
=(sinπ/3+cosπ/6)*(-tanπ/4)
=[(根号3)/2+(根号3)/2]*(-1)
=-根号3
(sin2π/3+cos11π/6)tan7π/4=
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