Question about Sharp EL-531VB Calculator
Hi have a problem, i must work out cot 78 and the answer is 0.213, but i get the wong answer everytime. my calculator is set to degrees but i cant seem to get that answer, can anyone help me please?
I don't have a Cot button but Cot x = 1/Tan x so enter
1/Tan 78 = 0.212556 etc if you have a fraction button you can write it that way too:
1 frac button Tan 78 = 0.212556 etc
Posted on Jun 17, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
Jul 09, 2014 | Texas Instruments TI-84 Plus Calculator
Apr 14, 2014 | Office Equipment & Supplies
SEC, CSC & COT are the INVERSE of COS, SIN & TAN and are usually require hitting the "2nd F" or "Func" key of the calc to make:
SIN button work as COSEC,
COS button work as SEC
TAN button work as COT
Formulas are below:
sec x = 1
cosec x = 1
cot x = 1 = cos x
tan x sin x
Feb 05, 2013 | Sharp EL531 Scientific Calculator
Jun 04, 2012 | Texas Instruments TI-36X Scientific...
Let's start with a little background.
The cot(x) is also known as the cotangent(x) and it equals 1/tan(x) which equals cos(x)/sin(x). I'm showing these formulas because your calculator may not have a cot button but it will probably have buttons for tan, cos, and sin.
Your calculator may also have buttons for tan-1, cos-1 and sin-1. These are the inverse functions for tan, cos, and sin. If you enter a number and then push the tan-1 button, the result is the angle whose tangent is the entered number. For example, it you enter 1 and push the tan-1 button the answer will be 45 deg because tan (45 deg) = 1.
Now let's look at the problem, cot(x) = -0.6.
The first thing we need to know is do you want the answer in degrees or radians? Your calculator will have both modes. The default mode when you first turn it on is probably degrees. If this problem is in radians you will need to change the mode of your calculator over to radians before we start.
If cot(x) = -0.6, then tan(x) = 1/-0.6 from the formula I showed in the background section.
This means tan(x) = -1.6666666...
Now we just enter -1.66666667 and hit the tan-1 button to get the answer.
If we're operating in radians the answer is -1.0307 radians.
If we're operating in degrees the answer is -59.036 deg.
I hope this helps you out.
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