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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thequestionaboutmath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!)]thequestionaboutma
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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