# Trig. Ratios

Discussion in 'Math' started by Steve1992, Oct 10, 2006.

1. ### Steve1992 Thread Starter Senior Member

Apr 7, 2006
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Is there an easy method on how to remember the trig. ratios on a right angled triangle...tan, cos, sin..?

I always find myself referring to my notes.

2. ### Papabravo Expert

Feb 24, 2006
10,340
1,850
From my class in conventional machining which I took at the local community college

SOH CAH TOA (pronounced SOO-KAA-TOW-AH). I forget the slightly filthy acronym that goes with it, but it decodes as:

SOH - Sine is Opposite over Hypoteneuse
CAH - Cosine is Adjacent over Hypoteneuse
TOA - Tangent is Opposite over Adjacent

3. ### electro eto New Member

Oct 5, 2006
4
0
well i always use OHSAHCOAT. the pronounciation alone could not be any easier.

OH=S i.e OPPOSITE/HYPOTHENUS =SINE

well thats the easiest way i learn it. work form me so hopefully it should work fro u too.

4. ### Steve1992 Thread Starter Senior Member

Apr 7, 2006
100
0
Thanks all.
I'll give them a try.

Steve

5. ### Dave Retired Moderator

Nov 17, 2003
6,960
145
A favourite phrase of mine for remembering SOHCAHTOA was:

Smiles Of Happiness Come After Having Tankards Of Ale

You may also begin enjoying trigonometry!

Dave

6. ### Papabravo Expert

Feb 24, 2006
10,340
1,850
Sorry Dave, it may be mnemonic, but it fails the "slightly filthy" criteria.

ROFL

7. ### Dave Retired Moderator

Nov 17, 2003
6,960
145
Accepted, but it is very true.....and there is some educational value in it!

Dave