Video: Txoj cai cosine siv rau dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg Siv
Cov Txoj cai ntawm Cosines muaj txiaj ntsig zoo rau kev nrhiav: sab thib peb ntawm daim duab peb sab thaum peb paub ob sab thiab lub kaum sab xis ntawm lawv (xws li cov piv txwv saum toj no) lub kaum sab xis ntawm daim duab peb sab thaum peb paub tag nrho peb sab (raws li hauv qab no piv txwv)
Ua li no, txoj cai cosine puas ua haujlwm rau txhua daim duab peb sab?
Lub pythagorean theorem yog li tsuas yog siv rau txoj cai daim duab peb sab hos cov txoj cai ntawm cosines tuaj yeem siv rau tej daim duab peb sab.
Ib yam li ntawd, txoj cai cosine rau daim duab peb sab yog dab tsi? Txoj Cai Cosine (The Law of Cosine ) Cov Txoj Cai Cosine hais tias qhov square ntawm qhov ntev ntawm ib sab ntawm a daim duab peb sab sib npaug ntawm qhov sib npaug ntawm cov squares ntawm qhov ntev ntawm lwm sab rho tawm ob zaug lawv cov khoom siv los ntawm cosine ntawm lawv suav nrog.
Tsis tas li ntawd, txoj cai sine thiab txoj cai cosine yog dab tsi?
Cov Kev cai lij choj ntawm Sines thiab Cosines . Cov Txoj cai ntawm Sines tsim kev sib raug zoo ntawm lub kaum sab xis thiab sab ntev ntawm ΔABC: a/sin(A) = b/sin(B) = c/sin(C). Qhov no yog qhov tshwm sim ntawm qhov tseeb tias cosine , tsis zoo li sib , hloov nws cov kos npe nyob rau hauv qhov ntau ntawm 0 ° - 180 ° ntawm lub kaum sab xis ntawm daim duab peb sab.
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 lub kaum sab xis A, B thiab C hauv ib qho daim duab peb sab , then: a = b = c. sinA sinBsinC.
Pom zoo:
Puas yog txoj cai cosine ua haujlwm rau txhua daim duab peb sab?
Los ntawm qhov ntawd, koj tuaj yeem siv Txoj Cai ntawm Cosines los nrhiav sab thib peb. Nws ua haujlwm ntawm txhua daim duab peb sab, tsis yog daim duab peb sab txoj cai xwb. qhov twg a thiab b yog ob sab muab, C yog lawv lub kaum sab xis, thiab c yog sab thib peb tsis paub
Dab tsi yog qhov txawv ntawm txoj cai khoom thiab txoj cai saw?
Peb siv txoj cai saw thaum sib txawv ntawm 'kev ua haujlwm ntawm kev ua haujlwm', zoo li f(g(x)) feem ntau. Peb siv txoj cai khoom thaum sib txawv ntawm ob txoj haujlwm sib npaug ua ke, zoo li f(x)g(x) feem ntau. Tab sis nco ntsoov lawv yog cov haujlwm cais: ib tus tsis vam khom rau cov lus teb rau lwm tus
Hund txoj cai thiab Pauli cais txoj cai nrog piv txwv yog dab tsi?
Hund's Rule hais tias yog 2 lossis ntau dua degenerate (piv txwv li tib lub zog) orbitals muaj, ib qho hluav taws xob nkag mus rau hauv ib qho kom txog thaum tag nrho lawv ib nrab puv ua ntej ua ke. ThePauli Exclusion Principle hais tias tsis muaj ob lub tshuab hluav taws xob tuaj yeem txheeb xyuas tau los ntawm tib pawg ntawm quantum tooj
Koj tuaj yeem siv txoj cai khoom siv tsis yog txoj cai quotient?
Muaj ob qhov laj thawj vim li cas txoj cai quotient tuaj yeem ua tau zoo dua rau txoj cai tswj hwm lub zog ntxiv rau cov khoom lag luam hauv kev sib txawv ntawm cov quotient: Nws khaws cov denominators thaum simplifying qhov tshwm sim. Yog tias koj siv txoj cai fais fab ntxiv rau cov khoom siv, feem ntau koj yuav tsum nrhiav ib tus lej sib piv kom yooj yim rau qhov tshwm sim
Txoj cai ntawm sine thiab cosine yog dab tsi?
Txoj Cai ntawm Sines thiab Cosines. Txoj Cai ntawm Sines tsim kev sib raug zoo ntawm cov ces kaum thiab sab ntev ntawm Δ ABC: a/sin(A) = b/sin(B) = c/sin(C). Sine yeej ib txwm zoo nyob rau hauv no ntau yam; cosine yog qhov zoo mus txog 90 ° qhov twg nws dhau los ua 0 thiab yog qhov tsis zoo tom qab ntawd