спростити тригонометричні вирази:
а) sin^2×2альфа-4sin^2альфа/ sin^2×2альфа+ 4 sin^2×альфа-4
а) sin^2×2альфа-4sin^2альфа/ sin^2×2альфа+ 4 sin^2×альфа-4
More Questions From This User See All
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
(4sin^2acos^2a-4sin^2a)/(4sin^2acos^2a+4sin^2a)-4=
=4sin^2a(cos^2a-sin^2a)/4sin^2a(sin^2a+cos^2a)-4=
=cos2a-4