# Change in angle gives change in one side of triangle

1. Nov 2, 2011

### georg gill

http://bildr.no/view/1015746

they solve it with derivation:

http://bildr.no/view/1015750

I tried to solve it like this:

$$x=tan^{-1}(\frac{tan75\cdot 30\cdot0,96}{30})=74,4048$$

75-74,4048=0,5952 too much error in angle compared to answer sheet

$$x=tan^{-1}(\frac{tan75\cdot 30\cdot1,04}{30})=75,5523$$

75,5523-75=0,5523 angle error under value in answer sheet

I dont get this: how come 1,04 of original height gives smaller max error in angle so that by adding that angleerror from the answer one would exceed the assignment of 4 percent of error in height because:

$$\frac{tan75,57\cdot 30}{tan75\cdot 30}=1,0413$$

Last edited: Nov 2, 2011