sin60°×sin45°+sin²15°+sin²75°-tan10°×cos10°=
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 14:41:17
sin60°×sin45°+sin²15°+sin²75°-tan10°×cos10°=sin60°×sin45°+sin²15°+sin²75°-tan10°
sin60°×sin45°+sin²15°+sin²75°-tan10°×cos10°=
sin60°×sin45°+sin²15°+sin²75°-tan10°×cos10°=
sin60°×sin45°+sin²15°+sin²75°-tan10°×cos10°=
sin60°×sin45°+sin²15°+sin²75°-tan10°×cos10°
=根号3/2*根号2/2+sin²15°+cos²15°-sin10°/cos10°×cos10°
=根号6/4+1-sin10°(sin10°只能查表了,但是我觉得题目是不是应该是tan10°×cot10°呢,就不用查表了)
=一又四分之根六-sin10°