Subtle Array
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 Apr22 comment How does $\cos(\pi ) = -1$? Thank you for the clear and concise explanation. Apr22 comment How does $\cos(\pi ) = -1$? Seeing the unit circle helped put this into better perspective. I see now why my teacher prefers it over using triangles. Thank you for your reply. Apr20 comment How do you plot $x = y^2 - 6$ on a graphing calculator? Lol. Yeah. It's a minor nitpick, but still. :P Apr20 comment How do you plot $x = y^2 - 6$ on a graphing calculator? I can't understand why a modern graphing calculator wouldn't allow me to just enter the equation as is, but this solution works, and it's good mental exercise. Thank you for your reply. Jan19 comment Oldest books on Calculus Apologies for my bad grammar. I more or less meant "how the ideas were outlined." I wanted to compare the differences between how Calculus was originally explained to how it's explained today. Jan19 comment Oldest books on Calculus Precisely. Thank you for your reply. Jan19 comment Oldest books on Calculus I just spent the last 20 minutes combing through Wikipedia and hadn't ran into that link once. Great find, and list. Thank you. Jan19 comment First Course in Linear algebra books that start with basic algebra? Thank you for the reply. I'll check it out. Jan19 comment First Course in Linear algebra books that start with basic algebra? Thanks! I'll check out the videos now.