Is tan(x)^2 proper notation for the trig function tangent squared?

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Discussion Overview

The discussion centers on the notation used for the tangent function squared, specifically comparing tan^2(x) and tan(x)^2. Participants explore the clarity and acceptability of these notations in mathematical contexts.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant asserts that tan^2(x) is equivalent to (tan x)^2 and questions the clarity of tan(x)^2 as proper notation.
  • Another participant argues that tan(x)^2 is not proper notation due to ambiguity regarding whether the argument or the function is being squared.
  • A third participant agrees with the previous claim about the lack of clarity in tan(x)^2.
  • In contrast, a different participant claims that tan(x)^2 is an acceptable syntax for tan^2{x}, noting its use in many calculators.
  • One participant expresses a preference for seeing tan(x)^2 represented as tan(x) · tan(x), indicating a specific concern about notation involving the exponent -1, suggesting it could be misinterpreted.

Areas of Agreement / Disagreement

Participants exhibit disagreement regarding the proper notation, with some rejecting tan(x)^2 as unclear while others find it acceptable. No consensus is reached on the issue.

Contextual Notes

Participants highlight the potential for confusion in notation, particularly regarding the squaring of the function versus the argument, but do not resolve these concerns.

xyz_1965
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Is tan^2 (x) the same as tan(x)^2?

Note: I could have used any trig function.

I know that tan^2 (x) means (tan x)^2.
What does tan (x)^2 mean? Is it proper notation?
 
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I don't consider $$\tan(x)^2$$ to be proper notation. It is unclear whether the argument or the function is being squared.
 
MarkFL said:
I don't consider $$\tan(x)^2$$ to be proper notation. It is unclear whether the argument or the function is being squared.

I concur.
 
$\tan(x)^2$ is an acceptable form of syntax for $\tan^2{x}$ used in many calculators.
 
Personally I would like to see [math]tan(x)^2 = tan(x) \cdot tan(x)[/math]. My problem isn't with the 2 but with a -1. [math]f^{-1}(x)[/math] may be equally considered to be [math]\dfrac{1}{f(x)}[/math] or the inverse function of f(x).

So long as the parenthesis are included in [math]tan(x)^2[/math] I have no problem with the expression.

-Dan
 

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