- #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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Homework Help Overview
The discussion revolves around evaluating the expression cos^2(30) using a scientific calculator, focusing on the interpretation of the notation involved.
Discussion Character
- Conceptual clarification, Mathematical reasoning
Approaches and Questions Raised
- Participants explore the meaning of cos^2(30) and its implications for calculator input. Questions arise regarding the notation and how to correctly interpret and input the expression.
Discussion Status
Some participants have offered clarifications on the notation, distinguishing between cos^2 T and cos T^2, which has led to a deeper exploration of the expression's meaning. There is an ongoing exchange of ideas without a definitive resolution yet.
Contextual Notes
Participants express uncertainty about their previous knowledge of trigonometric functions and calculator usage, indicating a potential gap in understanding the notation and its application.
- #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).
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