Nje malunga ne-sine entsonkothileyo cosine

Nje malunga ne-sine entsonkothileyo cosine!

Abafundi abaninzi ingqikelelo sine, cosine, kodwa azikweli phezulu, njengenani elinekona ezisibhozo ngathi inzima, kodwa ke eneneni kulula. Kufuneka nje ukuba nomfanekiso ezinye iikhonsepthi nezo aqonde ngokucacileyo ngokwabo.

Ukuze esi sibonelelo Stock neemathiriyeli ngesandla, ezifana iipeni, iipensile, stapler, iphawule, irabha, njl .. Ke ukuba isikali yokulinganisa uze wenze umboniso. kuya kuba lula kunokuba ucinga yonk 'into!

Uya kuqokelela izinto ezivela sethu unxantathu lasekunene-angled enamacala A, B, C, kunye angela Y.

unxantathu cala uthi akukho nto emangalisayo, njengoko nayiphi na incwadi. Kodwa kufuneka ube nomonde yaye siya kuqhubeka. Thatha umphathi, umlinganiselo icala B, unayo yindlela into, bathi ipensile. Ulinganise ubude ipensile kwaye ujikeleze imilinganiselo japan ifunyenwe ku cm. kwicala lethu B kwaqeshiswa ngokweesentimitha ezintathu. kwicala A. ezingqinisisekayo sentimitha ezintlanu. Ngoku yahlula ubude kwicala A nangapha B. Eli ubude lulwahlulo A B = A / B = 5/3, nabanako ukwahlulelana ngayo A B ukufumana 3/5, C B, njl

Kwaye ngoku kwandisa nxantathu. Yandisa isandla A, B no-C Yenza oko ngokusebenzisa izinto zayo zokubhala.

Ngoku ke emacaleni nxantathu A, B, C ijike ibe D, G, L. umlinganiselo emacala A kunye F, isimo sabo 10/6. Kwaye ke A / F = 10/6 = 5/3. Ubudlelwane kunye namanye amaqela afanelekileyo kwakhona ayikatshintshi. Ungakala ubude, kwaye ukuholwa. Le ishishini wonke umntu! Ayikwazi ezinemvume ukutshintsha ubude macala kwi ilungelo unxantathu, ukwanda, ukuncipha, ngaphandle kokutshintsha-engile ka Y - ukuzalana amaqela achaphazelekayo andiguquguquki.

Ukuba utshintsho engile Y, ukunyusa okanye unciphise, lonke icala ubude ubuhlobo kutshintsha. Zibonele wena.

Njengoko wathembisa ngaphambili, yonke into elula. Masisondele izigqibo. Ubudlelwane kwi emacaleni unxantathu yoxande komntu akuxhomekekanga ekuzithandeleni ubude emacaleni (ekujikeni efanayo), kodwa kakhulu ixhomekeke kule engile. Kwaye zonke ezi ubudlelwane zamaqela kufuneka aqonde amagama:

SIN Y = / A C Sine ye angela Y lulwahlulo icala elichasayo (ephezulu kwikona) ukuya hypotenuse.

COS Y = B / C. Le engile Y cosine ecaleni osecaleni ratio (libya) ukuya hypotenuse.

Sine kwaye cosine na netrigonometri, kwaye kokuqonda amanye amanani ahlukile engile nganye. Njengoko kanti yonke into ilula kakhulu.

Sine kwaye cosine imisebenzi ngqo netrigonometri. Uvumelane ukuba netrigonometri ezifana ebaxiweyo (KT x) kunye elinekona ezisibhozo (ctg x).

Neminye imisebenzi netrigonometri secant (umzuzwana x) kunye CSC (cosec x), kodwa inkoliso kusenokwenzeka abayi ukuhlangabezana njalo rhoqo. Ukongeza kwezi zintandathu, kukho kwakhona ezinye imisebenzi asetyenziswa enqabile netrigonometri (versinus njl), kwaye umsebenzi netrigonometri (sine arc, arc cosine kunye t. D.).

Ndiyathemba nonke ukuqonda, kwaye akwazi ukusebenzisa!