化简cos(π/4-α)²+cos(π/4+α)²_数学解答

化简cos(π/4-α)²+cos(π/4+α)²

人气：130 ℃　时间：2020-02-05 22:41:52

解答

；cos(π/4-α)²+cos(π/4+α)²=cos(π/4-α)²+sin【π/2-(π/4+α)】²=cos(π/4-α)²+sin（π/4-α)²=1