Dab tsi yog qhov sau thiab ntau ntawm sine muaj nuj nqi?
Dab tsi yog qhov sau thiab ntau ntawm sine muaj nuj nqi?

Video: Dab tsi yog qhov sau thiab ntau ntawm sine muaj nuj nqi?

Video: Dab tsi yog qhov sau thiab ntau ntawm sine muaj nuj nqi?
Video: Qhov Kev Sib Txheeb Ntawm Vajtswv thiab phau Vajluskub Yog Dab Tsi? 2024, Kaum ib hlis
Anonim

Cov sib thiab cosine muaj nuj nqi muaj aperiod ntawm 2π radians thiab tangent muaj nuj nqi muaj aperiod ntawm π radians. Domain thiab ntau yam : Los ntawm cov duab saum toj no peb pom tias rau ob qho tib si sib thiab cosine muaj nuj nqi tus sau npe yog txhua tus lej tiag thiab cov ntau yog txhua qhov tseeb ntawm −1 txog +1 suav nrog.

Yog li ntawd, dab tsi yog qhov sau thiab ntau ntawm kev txhaum thiab cos?

Cov sau npe of the functiony=cot(x)= cos (x) kev txhaum (x) yog tag nrho cov lej tiag tsuas yog cov nqi nyob qhov twg kev txhaum (x) yog sib npaug rau 0, uas yog, tus nqi π n rau tag nrho cov integers n. Cov ntau ntawm qhov muaj nuj nqi yog allreal tooj.

Tsis tas li ntawd, koj yuav nrhiav tau qhov chaw ntawm ib txoj haujlwm li cas? Rau hom no muaj nuj nqi , cov sau npe yog cov lej tiag. A muaj nuj nqi nrog ib feem nrog qhov sib txawv ntawm tus denominator. Yuav nrhiav tau sau npe ntawm hom no muaj nuj nqi , teem lub hauv qab sib npaug rau xoom thiab tsis suav nrog xvalue koj pom thaum koj daws qhov sib npaug. A muaj nuj nqi nrog ib tug txawv txav nyob rau hauv ib tug radical kos npe.

Ntawm no, dab tsi yog qhov sau thiab ntau ntawm trigonometric functions?

Cov ntau ntawm muaj nuj nqi yog cov txheej txheem ntawm cov zis uas tuaj yeem tsim los ntawm a muaj nuj nqi , muab nws sau npe . Rau qhov muaj nuj nqi y = f(x), tag nrho cov valuesthat x tuaj yeem ua tus sau npe ntawm muaj nuj nqi thiab tag nrho cov txiaj ntsig tso zis uas y yuav siv los ua tus ntau ntawm muaj nuj nqi.

Koj sawv cev li cas thiab ntau yam?

Hauv kev txiav txim khub {(-2, 0), (0, 6), (2, 12), (4, 18)}, sau npe yog txheej ntawm thawj tus lej hauv txhua tus khub (cov no yog x-coordinates): {-2, 0, 2, 4}. Cov ntau yog txheej thib ob ntawm tag nrho cov khub (cov no yog lawv-coordinates): {0, 6, 12, 18}. Cov lus no piav qhia y raws li kev ua haujlwm ntawm x.

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