Question

For those who want to remember the formulas for Sin, Cos, Tan, Cot, Sec and Co-sec. See the comment below.

Answer 1

Remember this mnemonic
\[\large \text{SOH CAH TOA}\]
This means:
\[\large {Sin = {opposite \over hypotenuse}}\]
\[\large {Cos = {adjacent \over hypotenuse}}\]
\[\large {Tan = {opposite \over adjacent}}\]

Now, imagine this like a mirror image:

\[\large \text{Sin Cos Tan|Cot Sec Cosec}\]

Cot is the reciprocal of Tan which is already given above.

Sec is the reciprocal of Cos which is already given above.

Co-Sec is the reciprocal of Sin which is already given above.

Answer 2

At school we got taught to draw a triangle and divide it into three. eg. if you had sin, you would put the letter s in the bottom left corner of the triangle, o in the top box and h in the bottom right box. Add in the value you know. If you had both values in the bottom box then you would times them together, if not you divide.

Answer 3

Fun fact...an acronym can also be associated with the cot, sec and csc funtions. I memorized them by the acronym CHOSHACAO.

Answer 4

@lgbasallote To much of acronyms can confuse, and you can forget them. So, SOH CAH TOA has helped me. I didn't need CHOSHACAO :)

Answer 5

Nao, do the same for integration. @inkyvoyd is a scumbag.

Answer 6

We never learnt CHOSHACAO too many letters to remember

Answer 7

I don't know integration either. Read my profile description. 'Not calculus'. Anything else?

Answer 8

Here's how I remembered it
soh cah toa
csc sec cot

Answer 9

so im the only one who uses that acronym :C

Answer 10

Hahaaaa

Answer 11

"Some People Have Curly Brown Hairs Turns Permanency Black"

Answer 12

@FoolForMath ?

Answer 13

Some = Sine = Perpendicular over hypotenuse

Answer 14

Oh! Nice. lol

Answer 15

We just learnt SOH CAH TOA at school

Answer 16

My teacher told me this when I first started learning Trigonometry.

Answer 17

The problem with SOH CAH TOA is sometimes my poor brain used to confuse the opposite and the adjacent.

Answer 18

Oh... I get it.

Answer 19

hmm wonder how opposite side became perpendicular?

Answer 20

We didn't get taught another way so it was remembering that or nothing

Answer 21

@piglet , I never got taught.

Answer 22

@FoolForMath Sometimes, hypotenuse can be the opposite side, like in sin90, so perpendicular cannot be used.