BLOGS WEBSITE
TAG: memory
The right order for the fundamental trig identity
If you google “fundamental trig identity” you will get many many images and handouts which all list the fundamental trig identity as:
sin2 t + cos2 t = 1
This is, of course in the wrong orderĀ and it should really have cos firstĀ then sin, like this:
(cos t)2 + (sin t)2 = 1
“But David,” you say, “it’s addition, […]
Posted in How people learn (or don't), Thoughts about maths thinking
Tagged memory, trigonometry
Leave a comment
Leave a comment