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where did the -1 come from and why is it an exponet

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where did the -1 come from and why is it an exponet

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Why are there three variables?

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i wonder what is the -1

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how they got the angle

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Why are there three variables ?

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I wonder if there are any other ways to calculate the equation

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A question I have is how did they get the angle.

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A question I have is how did they get the angle.

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why are there three variables

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where did the -1 come from

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A question that I have is why is there a negative number?

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What is the ¨inverse" cosine

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I wonder where he got the -1 from?

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A question I have is why is there and -1 on the top right corner of cos.

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How do you find the opp, adj and hyp without the angle

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how do you solve it? After you find the sign you are using what do you do?

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can they also be an opposite ?

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were do they know where the degree for the triangle is at.  

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were do they know where the degree for the triangle is at.  

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i dont get how they get the -1 on the cos

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I wonder how they got the -1.

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Where did the -1 come from in before of the 5/12.