>>21007996anon if you were capable of performing the calculations in your head, they still wanted you to waste the time working it out exactly how they showed it on the chalkboard.
>Draw in dirt. Use pebbles. Sticks, or whatever. You could come up with something. You can't just grab a calculator from the calculator tree.Try asking a high school math teacher to go over the steps a calculator uses to approximate sin(x). I'd be surprised if even 20-30% can give you a straight answer even though trig comprises almost half the math class time in grades 9-11.
These people just care about their jobs. That's why they all bent the knee when common core came along. They don't give a shit about their discipline. They're overpaid baboons wasting the best years of the children in their classes. Simple as.