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tan632°24',sin263°42' 转为锐角三角函数,照片答,坐等
人气:473 ℃ 时间:2020-08-28 09:21:39
解答
tan632°24'
=tan(360°+272°+24‘)
=tan(272°+24’)
=tan(180°+92°+24‘)
=tan(92°+24’)
=-tan(90°+2°+24‘)
=-ctg2°24’
sin263°42'
=sin(180°+83°+42‘)
=-sin(83°+42’)
=-sin83°42
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