Trig. Ratios

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

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  1. 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.
     
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  2. Oct 10, 2006 #2
    Papabravo

    Expert

    Feb 24, 2006
    10,858
    2,038
    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
     
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  3. Oct 10, 2006 #3
    electro eto

    New Member

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

    OH=S i.e OPPOSITE/HYPOTHENUS =SINE

    AH=C i.e ADJACENT/ HYPOTHENUS =COSINE

    OA=T i,e OPPOSITE/ADJACENT = TANGENT

    well thats the easiest way i learn it. work form me so hopefully it should work fro u too.
     
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  4. Oct 10, 2006 #4
    Steve1992

    Thread Starter Senior Member

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

    Steve
     
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  5. Oct 10, 2006 #5
    Dave

    Retired Moderator

    Nov 17, 2003
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    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
     
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  6. Oct 10, 2006 #6
    Papabravo

    Expert

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

    ROFL
     
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  7. Oct 11, 2006 #7
    Dave

    Retired Moderator

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

    Dave
     
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