Video: Koj puas tuaj yeem siv kev txhaum thiab cos ntawm cov duab peb sab tsis zoo?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Xav txog lwm tus tsis yog - txoj cai daim duab peb sab , sau npe raws li qhia nrog sab ntev x thiab y. Peb ua tau muab ib txoj cai muaj txiaj ntsig uas tsuas muaj cov cosine muaj nuj nqi. Txoj cai ntawm cosines ua tau siv los nrhiav qhov ntsuas ntawm lub kaum sab xis lossis ib sab ntawm a tsis yog - txoj cai daim duab peb sab yog peb paub: peb sab thiab tsis muaj kaum sab xis.
Tom qab ntawd, ib tus tuaj yeem nug, sine puas tuaj yeem siv rau ntawm daim duab peb sab tsis yog?
Txoj Cai ntawm Sines tau ua siv daws oblique daim duab peb sab ,qu yog tsis yog - txoj cai daim duab peb sab . Raws li Txoj Cai ntawm Sines , qhov piv ntawm qhov ntsuas ntawm ib qho ntawm cov ces kaum mus rau qhov ntev ntawm nws qhov opposite sab sib npaug rau lwm qhov sib piv ntawm lub kaum sab xis ntsuas rau sab nraud. Muaj peb kis tau: ASA, AAS, SSA.
Qhov thib ob, koj tuaj yeem ua Sohcahtoa ntawm cov duab peb sab tsis yog? Yuav ua li cas trigonometry siv rau tsis yog - txoj cai angled daim duab peb sab ? Rau ua qhov no, muaj yog Ob txoj cai, Txoj Cai Sine thiab Txoj Cai Cosine. Txoj cai sine yog a / Sin A = b / Sin B = c / Sin C. Txoj cai sine yog siv thaum koj txawm muaj vlaue ntawm ob lub ces kaum thiab ib sab, los yog ob sab thiab ib lub kaum sab nraud ib ntawm cov sab ntawm a daim duab peb sab.
Dhau li ntawm qhov no, puas yog qhov sib piv cosine ua haujlwm nrog cov duab peb sab tsis zoo?
Trigonometric functions yog txhais rau a txoj cai daim duab peb sab , tab sis qhov ntawd tsis txhais hais tias lawv tsuas yog ua haujlwm rau txoj cai daim duab peb sab ! Piv txwv li, muaj cov cai uas ua haujlwm rau tsis yog - txoj cai daim duab peb sab . Cov no yog hu ua txoj cai ntawm kev txhaum thiab txoj cai ntawm cosines . C^2 = A^2 + B^2 vim cosine ntawm 90 degree yog 0.
Dab tsi yog txoj cai sine rau Daim duab peb sab?
Cov Sine Txoj Cai Txoj Cai ntawm Sines ( txoj cai sine ) yog ib qho tseem ceeb txoj cai hais txog ob sab thiab cov ces kaum ntawm ib qho twg daim duab peb sab (nws tsis tas yuav yog lub kaum sab xis!): Yog tias a, b thiab c yog qhov ntev ntawm ob sab ntawm cov ces kaum A, B thiab C hauv ib qho daim duab peb sab , then: a = b = c. sinA sinB sinC.
Pom zoo:
Koj puas tuaj yeem qhia los ntawm cov kev nqus dej no seb lub teeb liab puas ua haujlwm zoo hauv kev tsav tsheb photosynthesis?
Ib qho tsis tuaj yeem qhia los ntawm daim duab no, tab sis vim tias chlorophyll ib lub teeb liab, peb tuaj yeem kwv yees tias nws yuav ua tau zoo hauv kev tsav tsheb photosynthesis. Cov xim no muaj peev xwm nqus tau ntau lub teeb ntawm lub teeb (thiab yog li ntau lub zog) dua li chlorophyll ib leeg tuaj yeem nqus tau
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
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
Cov kws kos duab hu li cas cov duab thiab cov duab siv los sawv cev rau cov yam ntxwv ntawm lub ntiaj teb nto?
Ntiaj Teb Kev Tshawb Fawb - Daim Ntawv Qhia Lub Ntiaj Teb Qhov Nto A B GLOBE Ib puag ncig uas sawv cev rau lub ntiaj teb nto. SCALE Siv los sib piv qhov deb ntawm daim ntawv qhia lossis lub ntiaj teb mus deb ntawm lub ntiaj teb nto. SYMBOLS Ntawm daim duab qhia chaw, cov duab siv los ntawm mapmakers sawv ntsug rau cov yam ntxwv ntawm lub ntiaj teb nto. TSEEM CEEB Ib daim ntawv teev cov cim siv rau ntawm daim ntawv qhia
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