Finding Exact Value of sin^-1(-9): A Beginner's Guide

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Homework Help Overview

The discussion revolves around finding the exact value of sin-1(-9) in degrees, which raises questions about the validity of the input value within the context of inverse sine functions.

Discussion Character

  • Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants explore the feasibility of calculating sin-1(-9), with some noting that the function typically accepts values only between -1 and 1. Others express uncertainty about the question's legitimacy in an academic setting.

Discussion Status

The conversation is ongoing, with participants questioning the premise of the problem and considering the implications of the input value. Some suggest that there may be an error in the question, while others seek clarification on the meaning of sin-1.

Contextual Notes

There is a mention of the problem originating from a university webwork assignment, which raises concerns about whether it could contain an impossible question.

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Homework Statement




How would I find the exact value of sin^-1 (-9) in degrees. I have no idea how to do this.
 
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zaddyzad said:

Homework Statement




How would I find the exact value of sin^-1 (-9) in degrees. I have no idea how to do this.

There's no such value. sin^(-1) only takes arguments between -1 and 1.
 
This is a question in my university webwork, so I don't know if they'd give a question that wouldn't have an answer.
 
Last edited:
zaddyzad said:
This is a question in my university webwork, so I don't know if they'd give a question that wouldn't have an answer.

There must be some mistake then. I'd speak to the authorities. sin^(-1) does mean arcsin, yes?
 
Last edited:

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