On Mon, Jan 13, 2020 at 03:18:14AM -0600, Shawn K. Quinn wrote:
On 1/11/20 18:44, Razer wrote:
Ps. The first time I ever saw a calculator allowed in a classroom, no less a test area, I knew American children would be a global math fail. You need to learn the mechanics, just like you need to learn Text is spelled TEXT not TXT, first. Then you can fake it. Which is what I always told the class A drivers I trained. Learn to do it MY way first, THEN you can do it your way.
It is important to know how to do basic math using only pencil and paper, but beyond addition, subtraction, multiplication, division, and square roots (which can be done on paper, just nobody teaches them anymore), a lot of the calculations start to get really tedious when you have to work out each step by hand (trigonometry functions, logarithms, etc) and the chances for errors go way up.
Even then, if you learn to differentiate ("re-establish") sin(), cos() and tan() from "first principles", that's not only a good feeling, but a prima facie demonstration of understanding, which opens doors to nutha level nunderstandin', muh muffaluggerahs :) Differentiating cos and sin from First Principles https://www.youtube.com/watch?v=cmBIyKQleWU Differentiating sin(x) and cos(x) from first principles https://www.youtube.com/watch?v=ojNz3Yd-mnI Differentiation of trigonometric functions - Wikipedia https://en.wikipedia.org/wiki/Differentiation_of_trigonometric_functions Derivatives of Sine, Cosine and Tangent https://www.intmath.com/differentiation-transcendental/1-derivative-sine-cos... Sin cos and tan from first principles — browse images https://yandex.com/images/search?text=sin%20cos%20and%20tan%20from%20first%20principles&stype=image&lr=21265&parent-reqid=1578910610374653-977297112862716815500123-vla1-3507&source=wiz
Yes, if you need a calculator to do 2+2, you deserve to fail math. But that's not why calculators are allowed on modern math tests.
-- Shawn K. Quinn <skquinn@rushpost.com> http://www.rantroulette.com http://www.skqrecordquest.com