化简sin15°-cos15°/sin15°+cos15°

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化简sin15°-cos15°/sin15°+cos15°化简sin15°-cos15°/sin15°+cos15°化简sin15°-cos15°/sin15°+cos15°sin15°-cos15°

化简sin15°-cos15°/sin15°+cos15°
化简sin15°-cos15°/sin15°+cos15°

化简sin15°-cos15°/sin15°+cos15°
sin15°-cos15°/sin15°+cos15°
=tan15°-1 / tan15°+1
=tan15°-tan45° / tan15°+1
=tan(15°-45°)
=-tan30°
=-√3/3