Cia li hais txog lub complex sine thiab cosine

Cia li hais txog lub complex sine thiab cosine!

Muaj ntau cov tub ntxhais kawm lub tswvyim ntawm sine, cosine, tangent, cotangent zoo li nyuab, tab sis nyob rau hauv qhov tseeb lawv yog ib qho yooj yim. Koj cia li yuav tsum pom ib co ntawm cov tswv yim thiab to taub lawv kom meej meej rau lawv tus kheej.

No kev mus Tshuag cov ntaub ntawv rau ntawm txhais tes, xws li cwjmem, cwj mem qhuav, roj hmab, highlighter, lwv, thiab lwm yam .. Thiab nco ntsoov ntsuas teev thiab ua ib tug qauv qhia. Txhua yam yuav yooj yim dua qhov koj xav!

Yuav sau cov khoom los ntawm peb txoj cai-angled daim duab peb sab nrog sab A, B, C, thiab lub Y.

Nruab nrab daim duab peb sab koj hais tsis yog tsis muaj dab tsi zoo kawg li, raws li nyob rau hauv tej phau ntawv nyeem. Tab sis tseem ua siab ntev thiab peb yuav mus ntxiv. Siv ib tug pas ntsuas thiab ntsuas lub B sab, koj muaj nws yog yuav ua li cas ib tug kwv, hais ib tug cwj mem. Ntsuas qhov ntev ntawm ib tug cwj mem thiab ib puag ncig cov uas tau ntsuas kom centimeters. Peb sab B yog cia rau peb centimeters. Ntsuas sab A. Tsib centimeters. Tam sim no sib faib qhov ntev ntawm lub sab A rau sab B. Qhov no ntev yog tus piv A mus rau B = A / B = 5/3, yuav tsum tau muab faib rau ib B tau 3/5, C rau B, thiab lwm yam

Thiab tam sim no kom peb tog. Ntev lub tes A, B thiab C. Ua los ntawm nws cov ntawv sau cov khoom.

Tam sim no lub sab ntawm daim duab peb sab A, B, C tig mus rau hauv D, G, L. Ntsuas lub sab A thiab F, lawv tus yam ntxwv 10/6. Thiab yog li ntawd A / F = 10/6 = 5/3. Kev sib raug zoo nrog lwm cov tog kuj tsis tau hloov. Koj yuav ntsuas qhov ntev, thiab koj yuav ntseeg nws. Qhov no yog txhua leej txhua tus ua lag ua luam! Yuav arbitrarily hloov lub lengths ntawm lub sab nyob rau hauv ib txoj cai daim duab peb sab, nce, txo, tsis muaj kev hloov lub kaum sab xis ntawm Y - lub kev sib raug zoo ntawm ob tog muaj kev txhawj xeeb yeej tsis hloov.

Yog hais tias lub kaum sab xis hloov Y, nce los yog yuav txo tau nws, tag nrho cov sab ntev kev sib raug zoo hloov. Saib koj tus kheej.

Raws li tau cog lus tseg lawm, txhua yam yog yooj yim. Cia peb los lus xaus. Kev sib raug zoo nyob rau hauv lub lub daim duab peb sab sab tsis yog nyob ntawm seb lengths ntawm lub sab (nyob rau tib lub kaum sab xis), tab sis xav nyob rau hauv no lub. Thiab tag nrho cov kev sib raug zoo ntawm ob tog ntawm cov hoob kawm muaj npe:

SIN Y = A / C. Sine ntawm lub kaum sab xis Y yog tus piv ntawm cov opposing sab (deb ntawm lub ces kaum) mus rau lub hypotenuse.

Cos Y = B / C. Qhov no lub Y cosine uas nyob ib sab sab ratio (tsis tshua muaj) mus rau lub hypotenuse.

Sine thiab cosine yog trigonometric functions, thiab ib tug yooj yim kev nkag siab ntawm ib co ntawm cov zauv yog sib txawv rau txhua lub kaum sab xis. Raws li nws muab tawm txhua yam yog yooj yim heev.

Sine thiab cosine yog cov ncaj trigonometric functions. Derivative lawv yog trigonometric functions xws li tangent (TG x) thiab cotangent (ctg x).

Lwm yam trigonometric functions secant (sec x) thiab CSC (cosec x), tiam sis feem ntau lawv yuav yuav tsis tau raws li feem ntau yog li. Nyob rau hauv tas li ntawd mus rau cov rau, tseem muaj ib co tsis tshua muaj siv trigonometric functions (versinus etc.), thiab cov trigonometric muaj nuj nqi (arc sine, arc cosine thiab t. D.).

Kuv vam tias koj tag nrho to taub, thiab yuav tau thov!