вычистить ctg4альфа, если ctg2альфа=1/4.
sin a = 1/4sin^2 a = 1/16cos^2 a = 1 - 1/16 = 15/16ctg^2 a = 15ctg a = -√15
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
sin a = 1/4
sin^2 a = 1/16
cos^2 a = 1 - 1/16 = 15/16
ctg^2 a = 15
ctg a = -√15
sin a = 1/4
sin^2 a = 1/16
cos^2 a = 1 - 1/16 = 15/16
ctg^2 a = 15
ctg a = -√15