Puas yog sin 45 thiab cos 45 tib yam?
Puas yog sin 45 thiab cos 45 tib yam?

Video: Puas yog sin 45 thiab cos 45 tib yam?

Video: Puas yog sin 45 thiab cos 45 tib yam?
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Yog vim li cas sine thiab cosine ntawm 45 degrees yog cov ib yam ? (Cov Lus Teb Yooj Yim Thov) - Quora. Hauv ob qho xwm txheej, cov cosine yog lub sine ntawm lub complementary lub kaum sab xis. Hauv qhov no, 45 degree thiab 45 degrees yog complementary ces kaum cosine ntawm ib tug yog lub txim ntawm lwm tus.

Ib yam li ntawd, tib neeg nug, qhov txiaj ntsig ntawm kev txhaum 45 cos 45 yog dab tsi?

Qhov tseeb tus nqi ntawm kev txhaum ( 45 ) kev txhaum ( 45 ) yog √22 2 2. Qhov tseeb tus nqi ntawm cos ( 45 ) cos ( 45 ) yog √22 2 2. Simplify cov ntsiab lus.

Ib tug kuj yuav nug, dab tsi yog qhov kev txhaum ntawm 45 degrees raws li ib feem? Cov sib txhais tau tias yog qhov piv ntawm qhov tawm tsam sab nraud thiab lub hypothenuse. Yog li ntawd, sib 45 o = 1 √2 = √22. Hauv daim ntawv decimal, nws yog kwv yees li 0.7071067812.

Yog li ntawd, tus nqi pes tsawg ntawm cos 45 yog dab tsi?

Teb thiab piav qhia: Lub pes tsawg tus nqi cos ( 45 °) yog √(2) / 2. Yog tias lub kaum sab xis hauv daim duab peb sab yog ntsuas α, ces qhov cosine ntawm lub kaum sab xis, los yog

Koj ua pov thawj li cas kev txhaum 45?

Hauv daim duab peb sab txoj cai, ib lub kaum sab xis yog, los ntawm txhais, 90 degrees yog li ob lub kaum sab xis suav nrog 180- 90 = 90 degrees. Rau ua pov thawj uas kev txhaum ( 45 (degrees)) yog 1√2, xav tias yog daim duab peb sab txoj cai muaj ib lub kaum sab xis nrog ntsuas 45 degrees ces lwm lub kaum sab xis yog 90- 45 = 45 degrees thiab.

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