三角函数简化 (sin(x-30)+cos(60-x))/sinx

日期:2015-01-07 23:58:20 人气:1

三角函数简化 (sin(x-30)+cos(60-x))/sinx

(sinxcos30-cosxsin30+cos60cosx+sin60sinx)/sinx =根号3
    A+
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