Also, with app design being so easily accessible (now as oppose to 7 years ago), students can actually use matrix multiplication when creating an app.

I think the main problem is having a math teacher teach matrices without having the bigger picture in mind.

]]>Sin(90)=1

-Sin(90)=-1

-1*-1=-Sin(90)*-Sin(90)

-1*-1=Sin(-90)*Sin(-90)

-1*-1=Sin^2(-90)

-1*-1=1-Cos^2(-90)

Since Cos(-90)=0==>Cos^2(-90)=0

-1*-1=1

Proved 🙂

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