Trig mnemonics like (http://mathworld.wolfram.com/SOHCAHTOA.html) focus on computations, not concepts: !(http://betterexplained.com/wp-content/uploads/trig/sohcahtoa-bleh.png) TOA explains the tangent about as well as $$$x^2 + y^2 = r^2$$$ describes a circle. Sure, if you're a math robot, an equation is enough. The rest of us, with organic brains half-dedicated to vision processing, seem to enjoy imagery. And "TOA" evokes the stunning
Better way to teach Matrix Multiplication. For Next time....
Stunning Product Photography with an iPhone and a Desk Lamp | Fstoppers
Interesting show - how calculate the value of the sine, cosine, tangent and cotangent of the angle 0◦, 30◦, 45◦, 60◦, 90◦. The fingers are numbered seq... - Matematyka - Matematyczny Świat wokół nas. - Google+