函数f（x）=sinx+sin（x+60°）的最大值是 A 根号3 B 根号3/2 C 2 D 1
人气：447 ℃ 时间：2020-04-16 17:37:49
解答
f（x）=sinx+sin（x+60°）
=2sin(x+30)cos30
=根号3sin(x+30)
最大值是
A 根号3具体步骤能写下吗？sina+sinb=2sin(a+b)/2*cos(a-b)/2
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