the question about math在时钟上,从2:00到4:00时针和分针之间有多少次成为60度的夹角,分别是什么时间?[不但要结果,(不写全者无权得赏!)]
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![the question about math在时钟上,从2:00到4:00时针和分针之间有多少次成为60度的夹角,分别是什么时间?[不但要结果,(不写全者无权得赏!)]](/uploads/image/z/9159935-23-5.jpg?t=the+question+about+math%E5%9C%A8%E6%97%B6%E9%92%9F%E4%B8%8A%2C%E4%BB%8E2%EF%BC%9A00%E5%88%B04%EF%BC%9A00%E6%97%B6%E9%92%88%E5%92%8C%E5%88%86%E9%92%88%E4%B9%8B%E9%97%B4%E6%9C%89%E5%A4%9A%E5%B0%91%E6%AC%A1%E6%88%90%E4%B8%BA60%E5%BA%A6%E7%9A%84%E5%A4%B9%E8%A7%92%2C%E5%88%86%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88%E6%97%B6%E9%97%B4%3F%5B%E4%B8%8D%E4%BD%86%E8%A6%81%E7%BB%93%E6%9E%9C%2C%EF%BC%88%E4%B8%8D%E5%86%99%E5%85%A8%E8%80%85%E6%97%A0%E6%9D%83%E5%BE%97%E8%B5%8F%21%EF%BC%89%5D)
the question about math在时钟上,从2:00到4:00时针和分针之间有多少次成为60度的夹角,分别是什么时间?[不但要结果,(不写全者无权得赏!)]
the question about math
在时钟上,从2:00到4:00时针和分针之间有多少次成为60度的夹角,分别是什么时间?[不但要结果,(不写全者无权得赏!)]
the question about math在时钟上,从2:00到4:00时针和分针之间有多少次成为60度的夹角,分别是什么时间?[不但要结果,(不写全者无权得赏!)]
设2时X分时,时针与分针之间夹角为60度
60+0.5X+60=6X
0.5X-6X=-60-60
-5.5X=-120
X=21 9/11 (表示21+9/11,你可以自己再算一下,回答仓促,不一定准确)
设3时X分时,时针与分针之间夹角为60度
1 90+0.5X+60=6X
0.5X-6X=-60-90
-5.5X=-150
X=27 3/11
2 90+0.5X-60=6X
0.5X-6X=60-90
-5.5X=-30
X=5 5/11
时针与分针在2点与4点之间有3次夹角为60度,分别为以上时间
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