cos4x = 6cos^2x - 5 ;
cos2x = 3 + 7cosx
cos2X = 3 + 7cosX
2cos"2(X) -1 = 3 + 7cosX
2cos"2(X) - 7 cosX - 4 = 0
(cosX - 4)(2cosX +1) = 0
cosX=4 , cosX = -1/2
X=nevozmojno naiti (tak kak bolwe 1) X = 120
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
cos2X = 3 + 7cosX
2cos"2(X) -1 = 3 + 7cosX
2cos"2(X) - 7 cosX - 4 = 0
(cosX - 4)(2cosX +1) = 0
cosX=4 , cosX = -1/2
X=nevozmojno naiti (tak kak bolwe 1) X = 120