opinion of trigonometry
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Hashemite
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« Reply #25 on: September 30, 2014, 06:22:12 AM »

I don't think I was totally disastrous at it (iirc, my disaster was calculus), but it should still be killed with fire.
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Cranberry
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« Reply #26 on: September 30, 2014, 12:46:31 PM »

That's sin, cos, tan, Pythagoras, that with graphs and functions and the lot? I found if easy, though not likely to be used again.

Perhaps Europeans call what we call geometry trigonometry? Trig here is the final course before calculus. Pretty much exclusively 11th and 12th graders.

     I suppose they also call algebra "calculus", since I've known many Europeans and Asians who took calculus in 10th grade in their own countries. Americans are really just that bad at Math.

We did trigonometry in 9th class. A girl from my class went to America for exchange last year, and she was in the junior year there; and they did exactly the same things we did then...
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Torie
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« Reply #27 on: September 30, 2014, 05:17:09 PM »

Something that I will likely never use again.

No plans to be a surveyor I take it.
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Ntwadumela
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« Reply #28 on: October 01, 2014, 12:49:24 AM »

math is cool, no need for argument in math, answers are provable
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« Reply #29 on: October 02, 2014, 10:06:37 AM »

confusing. I hated how "inverse sin" aka "(sin^-1)" and 1/sin were completely different things.
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muon2
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« Reply #30 on: October 16, 2014, 09:46:48 PM »

confusing. I hated how "inverse sin" aka "(sin^-1)" and 1/sin were completely different things.

That's a problem with how you were taught algebra, not trig. A function takes one or more values and produces an answer. Some functions only take a single value, like sine: y = sin(x). Another is the function for (scalar) multiplication: y = s(x) = s*x.

An inverse for a function is one such that if y = f(x) then x = f-1(y). Clearly your experience with the sine function fit that mold. But if algebra never taught that multiplication is a function, then you wouldn't think about the fact that x = s-1(y) = y/s. Then 1/sin is just the case where s is sin(z) but used in multiplication like a variable.
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Badger
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« Reply #31 on: October 17, 2014, 06:05:11 PM »

Something that I will likely never use again.
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Flake
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« Reply #32 on: October 17, 2014, 06:20:04 PM »

The worst type of math. HM.
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