Overview

Covid19 has spread globally. when the Covid-19 pandemic occurs, schools must be closed or partially opened, which affects teaching and learning. Educational innovations to deal with epidemics such as Covid-19 and other urgent epidemics are very important. Because some areas of mathematics are still incomplete today, this makes current technical tools such as online calculators Wolfram Alfa and Symbolab unable to direct solve certain Solution of triangle problems. This book also presents some incomplete and incorrect answers from Wolfram Alfa, Symbolab, and MathPortal as of July 7, 2022, to prevent misuse by students. This will cause students to reduce their interest in using today's technological tools and hinder the promotion of effective mathematics learning. In order to solve the above problems, I applied my new discovery, apply Peter chew Rule and Peter Chew triangle Diagram to Peter Chew triangle Diagram Calculator. Apply Peter Chew triangle Diagram to Peter Chew triangle Diagram Calculator enable the calculator can guide students to solve all solution of triangle problems directly, easily and accurately by a single rule. This will increase students interest in using Peter Chew triangle diagram calculator and increase the promotion of effective mathematics learning. When the future epidemics such as Covid-19 occur in the future, it can effectively help mathematics teaching, especially for students studying at home. 2nd Edition update some info and add Peter Chew Correction For Sine Rule. Peter Chew Correction For Sine Rule gives conditions for preventing wrong answers using the sine rule.

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