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How do I enter the ln function? - Texas Instruments TI-34II Explorer Plus Calculator

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You can't on this calculator, it can do numbers only

ln( 1) = 0
ln(2) = 0.69314718
...etc

Posted on Oct 12, 2009

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Iverse of ln


To calculate the natural antilogarithm (inverse logarithm ) of a number, press SHIFT [e^x] then enter the number and press =

The e^x function is the shifted function of the ln key.

For example, to calculate the inverse logarithm of 3, press SHIFT ln 3 =

Nov 06, 2013 | Casio FX-300MS Calculator

1 Answer

Inverse of ln


To calculate the natural antilogarithm (inverse logarithm ) of a number, press SHIFT [e^x] then enter the number and press =

The e^x function is the shifted function of the ln key.

For example, to calculate the inverse logarithm of 3, press SHIFT ln 3 =

Nov 06, 2013 | Casio FX-300MS Calculator

1 Answer

How to use ln formula


Almost all scientific calculators have a natural logarithm function, usually marked "ln" or "LN" on the keyboard. With some calculators you press the LN key and then enter the number, with others you enter the number and then press the LN key. If you need more specifics, you'll have to specify the make and model or your calculator.

Apr 08, 2013 | Office Equipment & Supplies

1 Answer

TI-89 "ln" function returning a "ln" answer


To convert a result from symbolic to numeric, press diamond ENTER. To have all results appear in numeric form, press MODE F2, use down-arrow to get to the "Exact/Approx" line, press right-arrow, down-arrow to "3:APPROXIMATE", press ENTER ENTER.

Feb 07, 2013 | Texas Instruments TI-89 Calculator

1 Answer

Enter sin squared in Ti-83


The position of the exponent in trig functions is an anomaly in mathematical notation. While the square of sin x is commonly written as
sin^2(x) ,
the square of any other function is written as f(x) ^2 . For example, you wouldn't write ln^2(2) if you mean the square of the natural logarithm of 2, instead you write it as ln(2)^2 or (ln(2))^2 .
The calculator works the same way. To calculate the square of the sine of 3, for example, press
SIN 3 ) ^ 2 ENTER

Nov 18, 2011 | Texas Instruments Office Equipment &...

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I am having trouble figuring out how to enter problems to find logarithmic functions


Let me give you a general recipe to familiarize yourself with any calculator, if you are averse to reading the manuals.
Most function will work in one of two ways.
1st way
Enter the number, then press the key,; the result is displayed.immediately.

Second way
Press the function key ( a left parenthesis may be displayed) enter the number (close the right parenthesis if there was a left one) press the = or EXE or ENTER keys.

Try the two ways described above to calculate the following values. The answers are given. Here log is he decimal logarithm and ln is the natural logarithm.


log(1)=0
ln(1)=0
ln(2)=0.693147181
log(2)=0.301029996
ln(100)=4.605170186

log(10)=1 (= number of zeros after the 1)
log(100)=2. (= number of zeros after the 1)
log(1000)=3 (number of zeros after the 1)
log(10000)=4 (number of zeros after the 1)

Aug 17, 2011 | Texas Instruments TI-30 XIIS Calculator

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Trying to plug in this problem and can't get anything ln 185 divided by ln 175.2. How can I do this??


Almost exactly as you wrote it.

2ND [LN] 1 8 5 ) / 2ND [LN] 1 7 2 . 5 ) ENTER

"LN" is the second function of the "X" key in the leftmost column of the keyboard. ")" is just above the "8" key.

Jul 19, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I want to know how to enter basic logs into the calculator: Example. Log3^9=2 How can you enter this into the calculator?


The 30XA only has logarithm functions for base e and base 10. However, you can calculate the logarithm to any base by using the relationship logb x = log x / log b = ln x / ln b

To calculate log3 of 9, press
9 LOG / 3 LOG =
or
9 LN / 3 LN =

Apr 03, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

What key do I need to press to put in expontenial and logarithmic functions?


The exponential function and the natural logarithm (LN) are inverse of one another. They share the same physical key. To calculate the natural log [LN] press the key marked LN and enter the number. Close the parenthesis) and press [=]
To calculate the exponential, use the key combination [SHIFT][LN] followed by the number.

Feb 25, 2011 | Casio FX-115ES Scientific Calculator

2 Answers

How do I find logarithms on the ti89?


For natural logarithms, you can use the ln function (2ND shift of the X key). For example, the natural logarithm of 3 is 2ND [LN] 3 ) ENTER.

For logarithms to other bases, use the log function (diamond shift of the 7 key). For example, the base-2 logarithm of 16 is diamond 7 1 6 , 2 ) ENTER. If the base is 10 (common logarithms), you can omit the comma and the second argument.

Apr 28, 2010 | Texas Instruments TI-89 Calculator

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