若f(sinx)=3-cos2x,则f(cosπ/6)=
人气：268 ℃ 时间：2020-02-03 10:03:58
解答
f(cosπ/6)
=f(sinπ/3)
=3-cos(2×π/3)
=3-(-1/2)
=7/2
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