Cov txheej txheem:
Video: Dab tsi yog cos sin thiab tan ntawm daim duab peb sab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov cosine (feem ntau abbreviated " cos ") yog qhov piv ntawm qhov ntev ntawm sab uas nyob ib sab mus rau lub kaum sab xis rau qhov ntev ntawm lub hypotenuse. tangent (feem ntau abbreviated " tan ") yog qhov piv ntawm qhov ntev ntawm sab opposite lub kaum sab xis rau qhov ntev ntawm sab uas nyob ib sab. SOH → kev txhaum = "opposite" / "hypotenuse"
Tsis tas li ntawd, koj yuav nrhiav tau qhov kev txhaum cos thiab tan ntawm daim duab peb sab li cas?
Nyob rau hauv txhua txoj cai angled daim duab peb sab, rau txhua lub kaum sab xis:
- Lub sine ntawm lub kaum sab xis = qhov ntev ntawm qhov opposite sab. 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 qhov opposite sab. qhov ntev ntawm sab uas nyob ib sab.
Tsis tas li ntawd, tus qauv rau SOH CAH TOA yog dab tsi? Nws yog ib qho khoom siv mnemonic los pab koj nco ntsoov peb qhov kev sib piv trig yooj yim siv los daws qhov ploj ntawm sab thiab cov ces kaum hauv daim duab peb sab. Nws txhais tau tias: SOH : Sin(θ) = Rov qab / Hypotenuse. CAH : Cos(θ) = Adjacent / Hypotenuse.
Hais txog qhov no, koj tuaj yeem siv Sin Cos Tan ntawm ib daim duab peb sab?
Cov Sine Txoj cai ua tau siv rau hauv tej daim duab peb sab (tsis yog lub kaum sab xis xwb daim duab peb sab ) qhov twg ib sab thiab nws opposite lub kaum sab xis paub. Koj yuav tsuas yog xav tau ob feem ntawm lub Sine Txoj cai formula, tsis yog tag nrho peb.
Dab tsi yog sine cosine thiab tangent rau?
Nplooj ntawv no piav qhia txog qhov sib , cosine , tangent ratio, muab rau ib tug saib xyuas ntawm lawv ntau yam ntawm qhov tseem ceeb thiab muab kev xyaum teeb meem ntawm kev txheeb xyuas cov sab uas yog opposite thiab nyob ib sab mus rau ib tug muab lub kaum sab xis. Cov Sine , Cosine thiab Tangent cov dej num qhia txog qhov sib piv ntawm sab ntawm ib daim duab peb sab.
Pom zoo:
Dab tsi yog peb seem ntawm daim duab peb sab semantic?
Lub Semantic Daim duab peb sab ntawm lub ntsiab lus muaj peb ntu. Cim npe, siv (xav), thiab xa mus
Dab tsi yog equidistant los ntawm peb sab ntawm daim duab peb sab?
Lub ntsiab lus uas sib npaug rau txhua sab ntawm daim duab peb sab yog hu ua incenter: Ib qho nruab nrab yog ib qho kab uas muaj ib qho ntawm nws qhov kawg ntawm lub vertex ntawm daim duab peb sab thiab lwm qhov kawg ntawm qhov nruab nrab ntawm sab opposite lub vertex. Peb qhov nruab nrab ntawm ib daim duab peb sab sib ntsib hauv centroid
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Dab tsi yog qhov txawv ntawm lub xeev daim duab kos duab thiab daim duab ua haujlwm?
Lub xeev daim duab qauv yog siv los qhia qhov sib lawv liag ntawm lub xeev uas ib yam khoom mus dhau, qhov ua rau kev hloov ntawm ib lub xeev mus rau lwm qhov thiab qhov kev txiav txim uas tshwm sim los ntawm lub xeev hloov. Daim duab ua haujlwm yog ntws ntawm kev ua haujlwm yam tsis muaj qhov tshwm sim (kev tshwm sim) mechanism, lub xeev tshuab yog suav nrog lub xeev triggered
Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees