- #1
starfish794
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How would I plug cos^2(30) into my scientific calculator to get the right answer? Thanks.
Plug cos^2(30) into my scientific calculator
- Thread starter starfish794
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In summary, "Plug cos^2(30) into my scientific calculator" means to enter the cosine of 30 degrees squared (cos^2(30)) into a scientific calculator to find the result. This is necessary because the equation involves a trigonometric function (cosine) and its square, which cannot be easily solved with a basic calculator. To correctly enter cos^2(30) into a scientific calculator, you will need to use the "cos" button, followed by the "^2" or "x^2" button and enter the value 30. The result when plugging cos^2(30) into a scientific calculator will be 0.75. It is not recommended to use a regular calculator or
- #2
arildno
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What does cos^2(30) mean? 
- #3
starfish794
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I don't remember, its been years since I've done that kind of math.
- #4
arildno
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Well, then, look it up in a math book.
Hint: What does ^2 mean in the expression?
Hint: What does ^2 mean in the expression?
Last edited:
- #5
kinthos
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There is a distinct difference between cos T^2 and cos^2 T. (Pretend that T=the angle.) Your problem asks for cos^2 T, or (cos T)^2 (calculator form). This means (cos T)(cos T), rather than cos (T*T).
Related to Plug cos^2(30) into my scientific calculator
1. What is the meaning of "Plug cos^2(30) into my scientific calculator"?
This means to enter the cosine of 30 degrees squared (cos^2(30)) into a scientific calculator to find the result.
2. Why do I need to use a scientific calculator to solve this equation?
The equation involves a trigonometric function (cosine) and its square, which cannot be easily solved with a basic calculator. A scientific calculator has the necessary functions and accuracy to solve this type of equation.
3. What is the correct way to enter cos^2(30) into a scientific calculator?
To enter cosine squared, you will need to use the "cos" button on your calculator, followed by the "^2" or "x^2" button to indicate the exponent. Then, enter the value 30 and press "=" or "enter" to get the result.
4. What will be the result when I plug cos^2(30) into my scientific calculator?
The result will be 0.75, as cos^2(30) is equal to 0.75 when solved using a scientific calculator in degree mode.
5. Can I use a regular calculator or my phone's calculator to solve this equation?
No, a regular calculator or phone's calculator may not have the necessary functions or accuracy to solve this equation correctly. It is best to use a scientific calculator for accurate results.
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