How to use SOHCAHTOA to find the missing angle in a right angle triangle

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How to use SOHCAHTOA to find the missing angle in a right angle triangle
This video is typically a grade B GCSE question and deals with SOHCAHTOA trigonometry.
The question asks you to calculate the value of an angle when given the hypoteneuse and adjacent.
I hope it helps and please do leave a comment below - thanks.
Visit www.mathswrap.c... for real maths, tips and techniques.

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[@3minutemaths]

+Isabella Mclellan - Glad to help and all best S :-)

[@MidnightSunPonyPal]

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[@3minutemaths]

Hi Rachel Jackson that's great and glad to help. All best with your studies :-)

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[@3minutemaths]

Hi Caderious Davis glad to help :-)

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[@3minutemaths]

+Bright Joe - Glad to help and all best with your studies S :-)

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[@3minutemaths]

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[@3minutemaths]

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[@3minutemaths]

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[@3minutemaths]

All very best with your exam and thank you for your comments :-)

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[@3minutemaths]

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I'm learning this for fun. I'm only 12 but now I understand Radians, Soh Cah Toa, and conversions from degrees to radians and vice versa. It's a lot more fun that learning in school because I know I'm doing this by myself and my own will.

[@3minutemaths]

That’s great and it’s good to see independent learning - all very best with your studies! S :-)

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[@3minutemaths]

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[@3minutemaths]

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[@3minutemaths]

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[@3minutemaths]

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[@3minutemaths]

JacobJohnsonRamirez That's great and glad to help. All best with your studies :-)

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+Canadian Eagle - Glad to help and all best with your studies :-)

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[@utayasurian419]

Such a great video which helped me out of my problem in finding the missing right angle. Thank you very much :)

[@3minutemaths]

+Utaya Surian - That's great and very glad to help :-)

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I have my main GCSE exam tomorrow. This really helped thanks

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The fact that I could spell hypotenuse but can't use it in a formula properly. Thanks for this.

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[@3minutemaths]

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[@3minutemaths]

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[@The_Reductionist]

one angle is right so it is 90 degrees. so if you can find one of the other two using trig then the last angle is simply found by adding up the sum of the two angles(90+ x ) and then subtracting by 180.

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I have a test tommrow and I was so confused but now I know it's -1 cosine. My life has been saved

[@3minutemaths]

+Mrs. Seokjin - Hi - that's great - remember it is cos^minus1 or cos to the power of minus1 (you should be able to find the key on your calculator). All best for your test :-)

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[@3minutemaths]

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[@The_Reductionist]

which calculator do you have? on most you can use shift then cosine button for cos-1 if thats what your looking for...but google is your friend for how to use a calculator

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How do you cosine to the power of negative 1 on a calculator ?

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can you make a video showing how to use the calculator when you are doing this because i cant get out the answer

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How do u input the co sign on your calculator

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[@stephenbarker100]

have i got this right if the angle is attached to the hypotenuse and adjacent its cos if attached to the opposite and hypotenuse its sin and opposite and adjacent its tan

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[@3minutemaths]

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[@3minutemaths]

Hi - no prob and good luck with the exams

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[@3minutemaths]

Glad to help and all best S :-)

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What if Opposite is given? What formula should i use?

[@3minutemaths]

Hi - the symbol you're looking for is cos-1. My calculator shows it in orange print and I need to press shift first. Hope this helps and thanks for the comment. Rgds S

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[@Grace-wn4ou]

Thank you Sir but i still need to know what if they've already given the degree inside the triange, that x there, and the Hyp was given too, which one do we use out of SOH or CAH or TOA? And how do you know if its that one? That is the one I'm struggling about in class. Hope you understand.

[@3minutemaths]

+Grace 지민 - Hi - I think the best way is always to label first ... and then to always label in the same order: OPP - opposite the angle you've been given HYP - the longest side ADJ - the one that's left From there you can decide whether to use Soh, Cah or Toa depending upon the information you've got. You'll have 2 out of the three pieces of information, the third piece will answer the question. Hope this helps and all best S :-)

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Simon Deacon thank you Sir so much. Now i get it. thank you for your help

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Saved my math grade

[@Gauranama]

Cheers. Nicely explained

[@3minutemaths]

+Gaura Nama - You're very welcome and all best with your studies :-)

[@madaeahdagondon1530]

+Simon Deacon Is it really Hypoteneuse? or Hypotenuse? I'm just confused :/

[@3minutemaths]

+Madaeah Dagondon - Hi - it's definitely 'hypotenuse' :-) lol

[@zeyadreda3955]

Tnx for this video Really useful

[@stephenbarker100]

i remember it as cos angle is attached to adjacent and hypotenuse sin is hypotenuse attached to opposite and tan adjacent attached to opposite

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[@3minutemaths]

+Mark Soliman - That's great and really glad to help :-)

[@lychee3946]

I can't seem to get it write on my calculator... the answer I'm getting is way off from urs... idk how to put it in my calculator

[@bradleyblack5868]

Thank you