- #1
dankelly08
- 15
- 0
how do you type in,
tan-1(-5/2) (or any negative number)
on the calculator?? or just work it out?
tan-1(-5/2) (or any negative number)
on the calculator?? or just work it out?
Inputting tan-1(-5/2) on a Calculator
- Thread starter dankelly08
- Start date
In summary, when typing in tan-1(-5/2) (or any negative number) on a calculator, there is usually a separate key for negative numbers, often labeled with a short dash in parentheses. For the -1, there is also a separate key, such as Second + Tan on a TI calculator. It's important to note that "tan-1" should be considered as a single function, not as x-1 = 1/x.
- #2
CompuChip
Science Advisor
Homework Helper
- 4,309
- 49
Are you talking about the (-5/2)? Most calculators have a separate key for that, which usually has something like "(-)" printed on it (a short dash in parentheses), rather than the normal (longer) minus sign "[itex]{}-{}[/itex]".
If you are referring to the -1: there should again be a separate key. On my TI calculator it is Second + Tan, just find where is says tan-1, atan, arctan, or something like that. Note that you should consider "tan-1" as a single function, it's not something like x-1 = 1/x, for which you can write in general x-n = 1/xn. Instead, it is defined by tan-1(tan(x)) = x.
If you are referring to the -1: there should again be a separate key. On my TI calculator it is Second + Tan, just find where is says tan-1, atan, arctan, or something like that. Note that you should consider "tan-1" as a single function, it's not something like x-1 = 1/x, for which you can write in general x-n = 1/xn. Instead, it is defined by tan-1(tan(x)) = x.
- #3
dankelly08
- 15
- 0
Yeah I got it, thanks alot! it was(+/-)
I spent a full hour trying to figure that out lol..
I spent a full hour trying to figure that out lol..
1. What does tan-1(-5/2) represent?
The expression tan-1(-5/2) represents the inverse tangent function of -5/2. In other words, it is the angle whose tangent is -5/2.
2. How do I input tan-1(-5/2) on a calculator?
To input tan-1(-5/2) on a calculator, you will need to press the "tan-1" or "inverse tangent" button, followed by the number -5/2. This will give you the value of the inverse tangent of -5/2 in radians or degrees, depending on your calculator's settings.
3. What is the numerical value of tan-1(-5/2)?
The numerical value of tan-1(-5/2) is approximately -0.98279 radians or -56.30993 degrees, depending on your calculator's settings.
4. Can I use a calculator to find the exact value of tan-1(-5/2)?
No, a calculator can only give you an approximate value for tan-1(-5/2). To find the exact value, you will need to use trigonometric identities and algebraic manipulation.
5. Is it necessary to include parentheses when inputting tan-1(-5/2) on a calculator?
Yes, it is important to include parentheses when inputting tan-1(-5/2) on a calculator. This ensures that the calculator accurately calculates the inverse tangent of -5/2 instead of the inverse tangent of -5 divided by 2.
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