Cov khoom dot txhais li cas?
Cov khoom dot txhais li cas?

Video: Cov khoom dot txhais li cas?

Video: Cov khoom dot txhais li cas?
Video: Teb Lus Rau Wa Moua Hmoob Nplog Cov Lus 2/14/2022 2024, Kaum ib hlis
Anonim

Hauv lej, the dot khoom los yog khoom scalar yog ib qho kev ua algebraic uas siv ob qhov sib npaug ntawm qhov sib npaug ntawm cov lej (feem ntau ua haujlwm vectors) thiab xa rov qab ib tus lej. Geometrically, nws yog khoom ntawm Euclidean qhov loj ntawm ob lub vectors thiab cosine ntawm lub kaum sab xis ntawm lawv.

Tom qab ntawd, nws txhais li cas yog tias cov khoom dot yog 1?

1 . Tus nqi ntawm cov dot khoom muaj qhov ntev square ntev, yog li nws txhais tau tias tsis muaj ib yam dab tsi uas tsis muaj ib khub ntawm qhov ntev los muab piv rau (xws li qhov ntev ntawm qhov qub vectors) tshwj tsis yog nws yog xoom, vim hais tias cov lus no ua tsis nyob ntawm qhov kev xaiv ntawm units.

Tsis tas li ntawd, nws txhais li cas thaum cov khoom lag luam zoo lossis tsis zoo? Hais lus dav dav, yog tias dot khoom ntawm ob tsis-zero vectors yog zoo , ces ob vectors taw tes rau tib qho kev taw qhia, lub ntsiab lus qis dua 90 degrees. Yog tias dot khoom yog tsis zoo , tom qab ntawd ob lub vectors taw qhia nyob rau hauv qhov sib txawv, lossis siab dua 90 thiab tsawg dua lossis sib npaug rau 180 degrees.

Ib yam li ntawd, lub hom phiaj ntawm cov khoom dot yog dab tsi?

Cov dot khoom yog tus nqi qhia txog kev sib raug zoo ntawm ob lub vectors.

Dot khoom piv txwv yog dab tsi?

Piv txwv : laim Dot Khoom for: a·b = |a| × |b| x cos(θ) a·b = |a| × |b| x cos(90°) a· b = |a| × |b| IB = 0.

Pom zoo: