Sine Rule. Txoj Cai Sine tuaj yeem siv rau hauv ib daim duab peb sab(tsis yog daim duab peb sab sab xis xwb) qhov twg ib sab thiab nws lub kaum sab xis yog paub. Koj tsuas yog xav tau ob feem ntawm Sine Rule formula, tsis yog tag nrho peb .
Koj puas tuaj yeem siv Txoj Cai ntawm Sines ntawm daim duab peb sab yog?
Txoj Cai ntawm Sines hais tias nyob rau hauv ib daim duab peb sab, piv ntawm ib sab ntev mus rau sine ntawm nws lub kaum sab xis yog tib yam rau tag nrho peb sab ntawm daim duab peb sab. Qhov no muaj tseeb rau txhua daim duab peb sab, tsis yog daim duab peb sab xwb .
Yuav ua li cas koj siv sine Hauv daim duab peb sab txoj cai?
Nyob rau hauv ib lub kaum sab xis, rau txhua lub kaum sab xis:
- Lub sine ntawm lub kaum sab xis=qhov ntev ntawm sab nraud. qhov ntev ntawm lub hypotenuse.
- Lub cosine ntawm lub kaum sab xis=qhov ntev ntawm sab uas nyob ib sab. qhov ntev ntawm lub hypotenuse.
- Lub tangent ntawm lub kaum sab xis=qhov ntev ntawm sab nraud. qhov ntev ntawm sab uas nyob ib sab.
Yuav ua li cas peb tog daws tsis tau siv txoj cai sine?
Yog peb muab ob sab thiab ib lub kaum sab xis ntawm daim duab peb sab lossis yog peb muab 3 sab ntawm daim duab peb sab, peb siv tsis tau Txoj Cai ntawm Sines vim peb tsis tuaj yeem teeb tsa nce ib qho kev faib ua feem uas muaj cov ntaub ntawv txaus paub .
Puas yog Pythagorean theorem tsuas yog rau txoj cai peb tog xwb?
Pythagoras' theorem tsuas yog ua haujlwm rau cov duab peb sab xis xwb, yog li koj tuaj yeem siv nws los ntsuas seb daim duab peb sab puas muaj lub kaum sab xis lossis tsis .
Maths Tutorial: Trigonometry Law of Sines / Sine Rule
