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计算：sin30°．
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教案备课库《2017年广东省茂名市茂南区祥和中学中考数学一模试卷》真题及答案
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计算sin30°+cos30°•tan60°.
sin30°＋cos30°sin30°－cos30°＋﹣12016÷2
计算sin30°＋tan45°＝.
计算sin30°·cos60°－cos30°·tan60°
计算sin300一23×0.125+20040+|-1|
计算sin30°·tan45°＝
计算sin30°﹣=.
计算|1﹣tan60°|﹣﹣sin30°﹣2+tan45°=.
计算sin30°+3tan60°﹣cos245°.
计算cos60°―sin245°+tan230°+cos230°一sin30°
计算2cos60°+cot30°tan45°﹣sin30°tan60°.
数学式子sin30°写成VB表达式是
Sin30
Sin（30）
Sin（30°）
Sin（30*3.14/180）
计算2cos230°﹣sin30°+.
下列结论中正确的有①sin30°＋sin30°＝sin60°②sin45°＝cos45°③cos25
为锐角，且sinA.＝cos28°，则∠A.＝62°. A.1个
2个
3个
4个
计算sin30°
三个数sin30°cos70°tan55°的大小关系是
sin30°＜cos70°＜tan55°
sin30°＜tan55°＜cos70°
tan55°＜cos70°＜sin30°
cos70°＜sin30°＜tan55°
计算sin30°tan45°－cos30°tan30°＋
计算|3﹣5|﹣π﹣3.140+﹣2﹣1+sin30°
计算sin046°+sin30°－tan260°
sin30°=
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