Txoj cai cosine yog siv thaum peb muab ob qho a) peb sab lossis b) ob sab thiab lub kaum sab xis
- Txoj cai sine. Kawm txog daim duab peb sab ABC hauv qab no. Cia B sawv rau lub kaum sab xis ntawm B. Cia C sawv ntsug rau lub kaum sab xis ntawm C thiab lwm yam. …
- Txoj cai cosine. Xa mus rau daim duab peb sab hauv qab no. b=AC. c=AB.
30 60 90 daim duab peb sab yog dab tsi?
Kev piav qhia: Ina 30-60-90 txoj cai daim duab peb sab ntawm sab shortest uas yog opposite 30 degree lub kaum sab xis yog ib nrab ntawm lub hypotenuse.
txoj cai cosine siv rau dab tsi?
Kev daws ib daim duab peb sab yog nrhiav qhov ntev ntawm txhua sab thiab tag nrho nws cov ces kaum. Txoj cai sine yog siv thaum peb muab ob qho a) ob lub kaum sab xis thiab ib sab, lossis b) ob sab thiab lub kaum sab xis tsis suav nrog. Txoj cai cosine yog siv thaum peb muab ib) peb sab lossis b) ob sab thiab lub kaum sab xis suav.
Txoj cai cosine puas siv tau rau ntawm ib daim duab peb sab?
Txoj Cai Cosine tuaj yeem siv tau hauv txhua daim duab peb sab uas koj tab tom sim txheeb tag nrho peb sab rau ib lub kaum. Yog tias koj xav pom qhov ntev ntawm ib sab, koj yuav tsum paub ob sab thiab lub kaum sab xis.
Tus qauv ntawm cosine yog dab tsi?
Tom qab ntawd tus qauv cosine yog, cos x=(sab nyob ib sab) / (hypotenuse), qhov "sab nyob ib sab" yog sab nyob ib sab ntawm lub kaum x, thiab "hypotenuse "yog qhov ntev tshaj plaws (sab tawm tsam rau lub kaum sab xis) ntawm daim duab peb sab.…
