Plug cos^2(30) into my scientific calculator

AI Thread Summary
To calculate cos^2(30) on a scientific calculator, first understand that cos^2(30) means (cos(30))^2, not cos(30*30). This involves first finding the cosine of 30 degrees, which is 0.866. Then, square that result to get approximately 0.75. It's important to clarify the notation, as cos^2 T indicates squaring the cosine value rather than multiplying the angle by itself. Properly interpreting the expression ensures accurate calculations.
starfish794
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How would I plug cos^2(30) into my scientific calculator to get the right answer? Thanks.
 
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What does cos^2(30) mean? :smile:
 
I don't remember, its been years since I've done that kind of math.
 
Well, then, look it up in a math book.

Hint: What does ^2 mean in the expression?
 
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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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