http://en.wikipedia.org/wiki/Rangefinder Reference to using trig to find range and distance http://www.csgnetwork.com/freqwavelengthcalc.html Calculator to find frequency and wavelength but you can’t see the maths behind the calculator Sonar and radar Medical scanning equipment Radio and TV broadcasts Computer graphics http://spokeanwheel.110mb.com/trig.htm Calculator using trig on bicycle wheels and spokes Forces and stress on vehicles Sine wave, cosine wave Suspension oscillations Mechanical engineering Electrical engineering http://farside.ph.utexas.edu/teaching/315/Waves.pdf Lengthy paper on oscillations, weights and trigonometry. Could be broken up into sections and read as background material or as a homework, read this section and discuss in class http://farnorthracing.com/alignment_rack.html http://wiki.seloc.org/a/Geo_Alignment_Rig_%28Home_Made%29 Homemade equipment showing measuring angles and dimensions. Could be used as a lead into a practical task Toe in toe out of any vehicle with wheels http://mtshome.sw3solutions.com/cppComputerGraphics.html Website with programs written in C++ using trig functions to draw lines, angles and circles Trigonometry in engineering Camber angles, castor angles http://catcode.com/trig/trig13.html A simple read through and sketch of trigonometry and how it is used in surveying www.gdjinc.com/pdf/VDExperiment.pdf Lengthy experiment using trig to find Camber and castor angles Civil engineering Surveying Squares and roots Forces in a bridge, truss angles Angles and flow in water supply and drainage Pythagoras Angles in roof joists, angles of a house roof Area of triangles http://www.physicsclassroom.com/CLASS/vectors/u3l1e.cfm#trig Trigonometrical resolution of vectors Simple diagrams with a dog and a lead http://www.engineeringtoolbox.com/drainage-pipepitch-d_1105.html Links to engineering toolbox with lots of different connections between maths and engineering Trigonometry http://www.constructionresource.com/calculators/roof-frame.php Roof angle calculator, put in the dimensions and the angle is calculated for you Cosine rule Measuring and finding angles SOH CAH TOA Sine rule http://www.nationalstemcentre.org.uk/elibrary/collection/125/the-royal-academy-ofengineering-mathematics-for-engineering#collection-resources Really good link to mathematics and engineering crossovers with resources Measuring and finding dimensions