How to use trigonometry on calculator

In summary, the conversation discusses how to use trigonometric functions on a calculator and specifically addresses an issue with finding the cosine of an angle in degrees. The solution involves changing the angle mode on the calculator.
  • #1
bcalkins
19
0
I know this is a pretty basic question, but it's holding me back from doing my homework due tonight. How do I use trig functions on my calculator. For example and problem in my book says:
(483 N) cos (44) = 347 N
When I plug it in my calculator like so:
(483)cos(44) =
I get: 482.9243181

What am I doing wrong??
Thank you SO much!
 
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  • #2
Your calculator is finding the cosine of 44 radians; You want to find the cosine of 44 degrees. If you have a T.I. 85 or 86, here's how to change the calculator from degrees to radian mode:

Press MODE.
The third option changes the angle mode between degrees and radians. Set this to degrees.
 
  • #3
Thank you very much!
 

FAQ: How to use trigonometry on calculator

1. How do I input trigonometric functions on a calculator?

To input trigonometric functions on a calculator, make sure your calculator is set to the correct mode (degrees or radians) and then use the designated buttons for sine, cosine, and tangent. These are typically labeled as "sin", "cos", and "tan" on the calculator keypad.

2. Can I use trigonometry to solve for angles on a calculator?

Yes, you can use trigonometry to solve for angles on a calculator by using inverse trigonometric functions. These are typically labeled as "sin^-1", "cos^-1", and "tan^-1" on the calculator keypad.

3. How do I use the Pythagorean theorem on a calculator?

To use the Pythagorean theorem on a calculator, you can use the square root function and the exponent function. For example, to solve for the hypotenuse (c) of a right triangle when given the lengths of the other two sides (a and b), you can use the equation c = √(a^2 + b^2).

4. Can I use trigonometry to solve for unknown sides on a calculator?

Yes, you can use trigonometry to solve for unknown sides on a calculator by using the sine, cosine, or tangent functions. Simply input the known angle and side lengths and use the appropriate trigonometric function to solve for the unknown side.

5. Is there a specific calculator that is best for using trigonometry?

While there are many different types of calculators available, any scientific calculator should have the necessary functions to perform trigonometric calculations. Some calculators may have additional features or a more user-friendly interface for trigonometry, so it may be helpful to do some research or read reviews to determine which calculator best suits your needs.

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