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I don't know this model, but most calculators have one or more special function keys, which may be labelled Shift, Function, Inv, etc.; you have to press this key before you press the cosine key.

This is correct, you have to press the "2ND" button (top left) and then "COS". You will notice that "COS-1" is written above the "COS" button- this is the function you want.

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Q: How do you find inverse cosine on a TI-84?
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Related questions

What is an inverse cosine?

The inverse of the cosine is the secant.


The inverse of the cosine function?

The inverse of the cosine is the secant.


Is the inverse cosine of 0.55?

The inverse if cosine 0.55 is 0.55


What are inverse sine inverse cosine and inverse tangent used for?

to find the measure of an angle. EX: if sin A = 0.1234, then inv sin (0.1234) will give you the measure of angle A


What is cosine inverse of pi?

udefined


How do you find the angle of a cosine?

You mean, you have the cosine, and want the angle? That is called arc-cosine, often written as cos-1x. Your scientific calculator should have a "shift" key or something similar, which you press, followed by the cosine key. That will give you the inverse cosine or arc-cosine.


What is the inverse of the cosine function?

The inverse of the cosine function is arcosine. The domain is −1 ≤ x ≤ 1 since the range of the cosine function is from -1 to 1. The range is from 0 to pi radians or 0 to 180 degrees.


What does csc stand for on a calulator?

Cosecant, or the inverse of the cosine.


What is an arccosh?

An arccosh is the inverse hyperbolic cosine function.


What is reciprocal in trigonometry?

The inverse of sine (sin) is cosecant (csc). The inverse of cosine (cos) is secant (sec). The inverse of tangent (tan) is cotangent (cot).


How do you find an angle using sine cosine tangent?

If you know the angle's sine, cosine, or tangent, enter it into the calculator and press <inverse> sine, cosine, or tangent. On MS Calc, in Scientific Mode, using Degrees, enter 0.5, then check Inv and the press sin. You should get 30 degrees. The other functions work similarly.


How do you work out the angles in a triangle with only 3 sides and no angles?

use the inverse sine or cosine or tangent