# Need help with solving this limit.

### Need help with solving this limit.

I’m struggeling, with the result of this limit. Especially “cos(x)^3”. Can someone explain what does it mean? According to my professor it means “cos^3(x), she is basically saying that cos(x)^3 = cos^3(x). I don’t think that it’s correct assumption. Can someone explain conventions of using paranthesis in this case. Thank you so much!!

NOTE: I know the calculus, I know how to use powered cos, sin etc. and I know that cos^3(x) is different from cos(x^3).
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### Re: Need help with solving this limit.

The point is that, since the exponent is outside the parentheses, it cannot apply to the x. The only thing left to apply it to is the function, cosine. Personally, I would prefer $$cos^2(x)$$ or even $$(cos(x))^2$$.

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