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Old 02-01-2018, 05:15 AM
8,137 posts, read 8,339,683 times
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When I learned trigonometry in high school they used to emphasize the mnemonic SOHCAHTOA
sine is opposite over hypotenuse, cosine is adjacent over hypotenuse, tangent is opposite over adjacent

The ratio definitions are so fundamental in education that I find that many people can't correlate the trigonometry terms with the geometry terms tangent, secant, arc, and complementary.
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Old 02-11-2018, 11:42 PM
Location: the city of Angels
2,214 posts, read 1,356,647 times
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This brings back a lot of memories.
Back in the 70's I worked in a shipyard doing lay out aboard the ship and the first thing my lead man gave me was a Illinois Tool Works Trigonometry Tables pocket sized book that I kept in my back pocket that had all the formulas for solving degrees and angles for different triangles.
It made solving complex degree layouts so simple.

I still remember doing the layout for the anchor chain hawse pipe that went forward, outboard, and downward from the main deck through 2 decks and then penetrating the hull using trig to lay it out.

Last edited by NickofDiamonds; 02-12-2018 at 12:00 AM..
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Old 02-27-2018, 12:40 PM
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Is it required? I'd say it depends on your level of math skill. Geometry was a prerequisite for Aglebra2/trig when I was in highschool. I don't think I would've had any trouble in trig had I skipped geometry. Heck, I did skip geometry a lot back then. Still aced it, but then again math was always very easy for me. So no, I don't it's necessarily needed beforehand, but I do think it would be beneficial for some prior to taking trig.
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Old 03-01-2018, 08:51 AM
Location: Upstate NY
28,315 posts, read 7,984,324 times
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Originally Posted by Debsi View Post
My high school track in the 90's was Algebra-Geometry-Trigonometry-Calculus. Unfortunately, I'm a dunce at Geometry. I loved Algebra.

I recently considered whether I should get second bachelor's degree in Computer Science and the 6+ higher mathematics classes in the track cooled my jets considerably.

Yours was the same as mine--in the '60s
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Old Today, 07:34 AM
Location: Frederick
111 posts, read 24,093 times
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It's odd, trigonometry and geometry were easy for me, I enjoyed them. They made an intuitive kind of sense to me because I could see the things and manipulate them in my mind. I hated algebra, etc. because it was so abstract....I couldn't see anything.
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