(sin75度+cos75度)/(sin75度-cos75度)=?
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(sin75度+cos75度)/(sin75度-cos75度)=?
sin75+cos75
=sin75+sin15
=2sin(75+15)/2cos(75-15)/2
=2sin45cos30
=√6/2
sin75-cos75
=sin75-sin15
=2cos(75+15)/2sin(75-15)/2
=2cos45sin30
=√2/2
(sin75度+cos75度)/(sin75度-cos75度)
=√6/2 / √2/2
=√3
=sin75+sin15
=2sin(75+15)/2cos(75-15)/2
=2sin45cos30
=√6/2
sin75-cos75
=sin75-sin15
=2cos(75+15)/2sin(75-15)/2
=2cos45sin30
=√2/2
(sin75度+cos75度)/(sin75度-cos75度)
=√6/2 / √2/2
=√3
sin75度*cos75度 求求求~
sin75度cos15度-cos75度sin15度的值为
cos75度cos15度-sin75度sin195度的值为?
计算:(cos75°+sin75°)(cos75°-sin75°)= ___ .
sin15度cos15度tan15度和sin75度cos75度tan75度怎样求 不光要结果
(sin75+cos75)的平方是多少
sin75度=?sin15度= cos75度= cos15度=?请帮我把公式的详细步骤写出来?
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