Question about Texas Instruments TI-84 Plus Calculator
5sin(x)+1 = 0 should equal about 3.343 or 4.365, but my calculator gives me an answer of -11.537...
I know that I am doing all of the steps right...
5sin(x) = -1
sin^(-1) (-.2) should not equal -11.537. whats wrong with my calculator?
5sin(x)+1 = 0 is the equation you want to solve?
5sin(x) = -1
sin(x) = -(1/5)
arcsin( sin(x) ) = arcsin( -(1/5) )
x = -.201 (radians)
x = -11.5369 (degrees)
Posted on Jun 04, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 25, 2014 | Casio FX-115ES Scientific Calculator
Oct 28, 2013 | Texas Instruments TI-81 Calculator
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.
Dec 06, 2011 | SoftMath Algebrator - Algebra Homework...
Jan 15, 2011 | Texas Instruments TI-89 Calculator
Jan 04, 2011 | Texas Instruments TI-89 Calculator
Oct 30, 2009 | Casio fx-300ES Calculator
Sep 08, 2009 | Office Equipment & Supplies
Jan 14, 2008 | Texas Instruments TI-89 Calculator
Feb 17, 2007 | Texas Instruments TI-83 Plus Calculator
283 people viewed this question
Usually answered in minutes!
Level 3 Expert
Level 3 Expert
Level 2 Expert