Question

急！一道简单高中数学题，详细解释

函数y=arccos(x-pai/6)的最大值是______

Answer 1

是同类项则a和b次数相同
所以n-6+3m+1=4 (1)
-2-n+2n=0 (2)
n=-2
m=(-n+9)/3=11/3
=1/4(1-cos2a)+2/5cos2a
=1/4-1/4cos2a+2/5cos2a
=3/20cos2a+1/4

Answer 2

aeccosx值域是[0,π]
所以最大值=π