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What is Cosecant inverse of $x$ equal to?

By Emma Terry
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What is $\csc^{-1}x$ = equal to?

Could anyone tell me the answer to this question?

This question was given to me exactly the same way I have written it here, they didn't ask for anything else but the value.

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2 Answers

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$$\csc^{-1}(x)=\sin^{-1}\left(\frac{1}{x}\right)$$

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To the power of negative one has two possible meanings (without context):

  • reciprocal - i.e. $\csc^{-1}x = \sin x$
  • inverse - i.e. $\csc^{-1}x = \operatorname{arccsc} x$

Assuming you have only recently starting doing $cosec$ I would say the first option is more likely what you were expected to give.

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