For years, students of mathematics have recalled
the trigonometric ratios by remembering the Great
Chief SOHCAHTOA.
Each letter of the Chief's name represents the
name of one of the trig ratios or the name of
a side of a right triangle.
-
Sine of an angle =
Opposite
side / Hypotenuse
-
Cosine of an angle =
Adjacent
side / Hypotenuse
-
Tangent of an angle =
Opposite
side / Adjacent side
Here are some mnemonics for recalling the trig
ratios:
-
Some Of Her Children Are Having Trouble Over Algebra.
-
Some Out-Houses Can Actually Have Totally Odorless Aromas.
-
She Offered Her Cat A Heaping Teaspoon Of Acid.
-
Soaring Over Haiti, Courageous Amelia Hit The Ocean And ...
-
Tom's Old Aunt
Sat On Her
Chair And Hollered.
-- (from Ann Azevedo)
-
Stamp Out Homework Carefully, As Having Teachers Omit Assignments.
-
Some Old Horse Caught Another Horse Taking Oats Away.
-
Some Old Hippie Chasing Another Hippie Tripping On Apples.
-
School! Oh How Can Anyone Have Trouble Over Academics?
-
Oh Heck! Another Hour Of Algebra with Some Crazy Teacher.
-
Two Old Angels
Skipped Over Heaven
Carrying Ancient Harps
-
Two Old Angels
Skipped Over Heaven
Carrying A Harp
-
Oscar Had A Heap Of Apples
- you just have to remember the sine,
cosine, tangent progression on your own.
-
Saddle Our Horses, Canter Away Happily, To
Other Adventures.
-
Silly old Henry, caught Albert Hugging
two old Aunts.
-
Some Old Hulks
Carry A Huge
Tub Of Ale
-
Stupid Old Hitler
Caused Awful Headaches
To Our Airmen
-
Some Old Hag
Cracked All Her
Teeth On Asparagus
-
Some Old Hairy
Camels Are Hairier
Than Others Are
-
Smiles Of Happiness
Come After Having
Tankards Of Ale!!!
-
The Cat Sat
On An Orange
And Howled Hard
-
Some Opera Houses
Can Always Have
The Overture Again
- Norman Sobieck from Michigan sent in the following:
Oscar Had A Heap Of Apples, Some Came Today!
Some = Oscar / Had
Came = A / Heap
Today! = Of / Apples
for the cosecant, secant, and cotangent functions...
Heather Ordered Harold An Albino Octopus, Cause She Can (or Could)
Cause = Heather / Ordered
She = Harold / An
Can! = Albino / Octopus
- David Greenberg sent in the following from his late geometry teacher, Jerry Vouso:
Old Homes,
Are Homes,
Of Angels
- again, you just have to remember the Sine, Cosine, Tangent progression on your own.
- G. Bulmer who is British sent in the following mnemonic from his teacher:
The Ordinary Army
Simple Officers Have
Curly Auburn Hair
She pronounced it with quite a broad 'Geordie' accent (I come from the North East of England).
- Joz from the UK sent in the mnemonic that he learned:
Some of his chums are having trouble over algebra.
- Paul Jackson sent in the following mnemonic:
Of All The African Hairy Crocodiles Only Half Smell
OAT AHC OHS
(Tangent / Cosine / Sine)
- Iain Little sent in the following mnemonic:
Some old hags chant ancient hymns to old Albert
- Jack Santcross sent in the following mnemonic that he learned in the late 1940s:
Some old hags carry a huge tub of ale