cos7Π/4=如题,麻烦过程写一下,谢谢!
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cos7Π/4=如题,麻烦过程写一下,谢谢!
cos7Π/4=
如题,麻烦过程写一下,谢谢!
cos7Π/4=如题,麻烦过程写一下,谢谢!
cos(7π/4) = cos(2π - π/4) = cos(π/4) = √2 /2
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cos7Π/4=如题,麻烦过程写一下,谢谢!
cos7Π/4=
如题,麻烦过程写一下,谢谢!
cos7Π/4=如题,麻烦过程写一下,谢谢!
cos(7π/4) = cos(2π - π/4) = cos(π/4) = √2 /2
收起