Hi Professor Can you help me? what am I doing wrong on this question? I started by using pythagorean theorem and arctan for the second
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In the first case the Pythagorean theorem gives that √(18^2+3^2)=√333=18.248 so that if you round to the nearest 0.1 the number you should get 18.2 because the second decimal is less than 5; maybe you rounded first with respect the third decimal place before you rounded with respect to the second one.
In the second case you gave me so little information about what you did that I really can't help you except to say that clearly you took the arctan of the wrong number. I suggest that you draw a labeled picture of the situation and figure out which angle you'd like to find.
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