cos(-195°)=????

👨🏻‍🏫 學術台數學

[匿名]

2007-01-15 3:48 am

cos(-195°)=????
要步驟
thx

回答 (2)

用戶112593

2007-01-15 3:54 am

cos(-195°)
=cos165°
=-0.965925826....

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fung

2007-01-15 3:51 am

只係想到答案....

answers is : -0.965925826

參考: 心算^^

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