simplify 3x-2tan(arctanx)?
回答 (2)
2016-10-16 2:18 pm
tan(arctan x) = x
since it's a function and its inverse
so that becomes 3x - 2x = x
since it's a function and its inverse
so that becomes 3x - 2x = x
2016-10-16 2:34 pm
Let y= arctan x
tan y = x
3x-2tan (arctan x) = 3x - 2 tan(y) = 3x - 2x = x
3x-2tan(arctan x) = x
tan y = x
3x-2tan (arctan x) = 3x - 2 tan(y) = 3x - 2x = x
3x-2tan(arctan x) = x
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