Smart people--the analytical trig thread

[reverend_kyle]

Hey smart people out there, reteach me analytical trig before my pre calculus final tommorrow.

[Aimless]

All you need to know : SOHCAHTOA.

(Sin = Opposite/Hypotenuse; Cos = Adjacent/Hypotenuse; Tan = Opposite/Adjacent).

[Neutrino]

How old are you? I learnt that stuff in grade 9.

[reverend_kyle]

I already know the easy stuff aimless. I'm thinking more along the lines of the unit circle half angle formulas all that stuff. Is there an easy way to learn/apply all of those.

I'm in 11th grade.

I learned the stuff aimless tried teaching in 7th grade.

[Aimless]

The double angle / half angle formulas are best learned by just sitting down and memorizing them. There's no easy way (that I know of) to derive them from first principles. Same goes for the law of cosines.

As much as I normally hate to recommend it, trigonometry is one of those subjects best learned by rote memorization.

[Aimless]

As for application, you'd have to supply me with a context. I'm far enough removed from my trig classes that I don't even remember what the problems were like.

[Incandenza]

Hey smart people out there, reteach me analytical trig before my pre calculus final tommorrow.

The good news is that I was in honors trig and AP calc, and kicked a decent amount of ass.

The bad new is that the last time I was in a math class was during Clinton's first term, and all that knowledge has since been eradicated by an amusing variety of essentially toxic substances...

sorry, bro. Good luck to ya.

[Syzygy]

All you need to know : SOHCAHTOA.

(Sin = Opposite/Hypotenuse; Cos = Adjacent/Hypotenuse; Tan = Opposite/Adjacent).

Or there's:

Shield Your Rear, Coz' X - Rays Tan Your eXterior...

(Sin = Y/R; Cos = X/R; Tan = Y/X).

Edit: Ah, but you want help with this....





Memorize them... that's all I can say.

Do you need to be able to prove them too or not?

[Stopper]

Hmm, that's a lot of formulae to write on the palm of your hand. Unless you have really big hands.

[got tonkaed]

might be time to wear a hat and a long sleeve rollable shirt....

fwiw i dont think anyones mentioned this...but smart people avoid these subjects and leave them to the other smart people who get paid to deal with these subjects.

[wicked]

store them in your cell phone.

[The1exile]

Hmm, that's a lot of formulae to write on the palm of your hand. Unless you have really big hands.

Hands? I usually write all the way up my right arm because there's so many formulae. As Aimless says, rote learning is the best way to do it, but if you forget it you're fucked then. Luckily in GCSE all the forumla are given to you. Unfortunately for additional maths they aren't and there's ahell of a lot more.

if you're REALLY running out of space, shoulders work too

[unriggable]

All you need to know : SOHCAHTOA.

(Sin = Opposite/Hypotenuse; Cos = Adjacent/Hypotenuse; Tan = Opposite/Adjacent).

Some
Old
Hippy
Caught
Another
Hippy
Tripping
On
Acid

[KennyC]

This is where my greatest high school investment came into play. My TI-89 calculator got me through so many math classes through high school and college.

[RobinJ]

OR:

The Cat Sat
On An Orange
And Howled Horribly


Also the Sin Rule:

a/Sin A = b/Sin B = c/Sin C

Area rule = .5(a+b)Sin C

Cosine Rule:

a^2 = b^2+c^2 - 2bc Sin C

(I just did m Additional Maths Exam last week btw)

[sully800]

Just write 'sign' everywhere instead of 'sin' and your teacher will give you an A because you try so hard and you're so damn cute...