Angle of Elevation

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Sudoku

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Hey everyone!! So, if someone could tell me the steps on how to even begin this problem that would be great!! (I know we are suppose to upload the steps we take but I honestly do not know where to begin) You don not need to solve it, I just need literally any advice regarding what I should know going into it, like rules/formulas, and that would be very much appreciated, thank you for giving your time to help!!
 
Angles TBM, TBA and TBC are all right angles. Label all the sides and see what happens from there.
 
There is a lot of unnecessary info in the diagram. TBM is a right angled triangle.
Write an expression for tan(angle 63.4o). Write an expression for tan(angle of elevation of N from M). Now what?
 
Harry_the_cat said:
There is a lot of unnecessary info in the diagram. TBM is a right angled triangle.
Write an expression for tan(angle 63.4o). Write an expression for tan(angle of elevation of N from M). Now what?
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Ahhh!! Thank you so so so much!! I got it!! ( I have the answer the key and it said 45 degrees was the answer but I didnt know the steps) All of you are so amazing!! I can't thank y'all enough
 
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