How do I calculate inverse trig functions?

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Homework Help Overview

The discussion revolves around the calculation of inverse trigonometric functions, specifically the arctangent function. Participants are exploring the conversion between radians and degrees and addressing discrepancies in their calculations.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the results obtained from calculators and discussing the conversion between radians and degrees. There is an exploration of how to properly use calculator functions to switch between these units.

Discussion Status

The discussion is active, with participants providing insights on unit conversion and calculator usage. Some have expressed confusion about the need for conversion and the functionality of their calculators, while others have offered clarifications and encouragement.

Contextual Notes

Participants mention a lack of prior knowledge regarding unit conversion and express concerns about their mathematical background as they prepare for studies in science and engineering.

Alanay
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On the paper I'm reading the arctan of 35 over 65 is approx. 28.30degrees.

When I use the Google calculator "arctan(35/65)" gives me 0.493941369 rad.

What am I doing wrong?
 
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Alanay said:
On the paper I'm reading the arctan of 35 over 65 is approx. 28.30degrees.

When I use the Google calculator "arctan(35/65)" gives me 0.493941369 rad.

What am I doing wrong?
What is 28.30 degrees in radians?
 
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Samy_A said:
What is 28.30 degrees in radians?
Ah, I wasn't told I could convert radians to degrees. Thank you. :eek:
 
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Alanay said:
Ah, I wasn't told I could convert radians to degrees. Thank you. :eek:

Nobody has to ""allow"" you to change units; you can do it if you want to, and sometimes you MUST do it (as in this case).
 
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Alanay said:
Ah, I wasn't told I could convert radians to degrees. Thank you. :eek:
That's what the 'RAD'/'DEG' button in the upper left hand calculator is for, to allow you to select the units of angular measure.

Haven't you ever used a regular calculator with this feature?
 
SteamKing said:
That's what the 'RAD'/'DEG' button in the upper left hand calculator is for, to allow you to select the units of angular measure.

Haven't you ever used a regular calculator with this feature?
No, I did poorly in my Math exams. Now I am going to be studying science and engineering which is very ambitious if you think about my past with mathematics. But now I'm 18 it isn't very difficult to grasp different concepts so I'm learning at a much faster rate. My only problem is not being distracted. Thanks for notifying me of the option on the calculator, I never noticed it before.
 
Hey, one radian is 180 degrees / pi, which is about 57.3 degrees.

In other words, 360 degrees is equal to 2*pi radians. Keep these numbers in mind, they may save you in future tests / quizzes!
 
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