written by
Gary Gladding
published by
the University of llinois Physics Education Research Group
This is an interactive homework problem for introductory physics students. It shows a person on the ground looking up at an angle of 28° and seeing a tree and a building aligned. With the given information, the student must determine the difference in height between the building and tree.
A user-activated "help" sequence is provided for each step of the problem-solving, from conceptual analysis through quantitative calculation. Immediate feedback is received for both correct and incorrect responses. This item is part of a larger collection of interactive homework problems for introductory physics. See Related items on this page for a link to the full collection.
<a href="https://www.compadre.org/introphys/items/detail.cfm?ID=6415">Gladding, Gary. Illinois PER Interactive Examples: Trigonometry. Urbana: University of llinois Physics Education Research Group, June 16, 2006.</a>
G. Gladding, (University of llinois Physics Education Research Group, Urbana, 2006), WWW Document, (https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry).
G. Gladding, Illinois PER Interactive Examples: Trigonometry (University of llinois Physics Education Research Group, Urbana, 2006), <https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry>.
Gladding, G. (2006, June 16). Illinois PER Interactive Examples: Trigonometry. Retrieved March 22, 2025, from University of llinois Physics Education Research Group: https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry
Gladding, Gary. Illinois PER Interactive Examples: Trigonometry. Urbana: University of llinois Physics Education Research Group, June 16, 2006. https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry (accessed 22 March 2025).
Gladding, Gary. Illinois PER Interactive Examples: Trigonometry. Urbana: University of llinois Physics Education Research Group, 2006. 16 June 2006. 22 Mar. 2025 <https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry>.
%A Gary Gladding %T Illinois PER Interactive Examples: Trigonometry %D June 16, 2006 %I University of llinois Physics Education Research Group %C Urbana %U https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry %O text/html
%0 Electronic Source %A Gladding, Gary %D June 16, 2006 %T Illinois PER Interactive Examples: Trigonometry %I University of llinois Physics Education Research Group %V 2025 %N 22 March 2025 %8 June 16, 2006 %9 text/html %U https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys101/ie/01/trigonometry
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