math.cos(x) not returning correct value?

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一向
一向 2021-01-25 22:45

I just started using python, and am having difficulty with a very basic program. I want to calculate the cosine of -20 degrees. It is my understanding that the default value is

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  •  一个人的身影
    2021-01-25 23:23

    math.degrees takes a number of radians and produces a number of degrees. You need the opposite conversion - you have a number of degrees, and you need to produce a number of radians you can pass to math.cos. You need math.radians:

    math.cos(math.radians(-20))
    

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