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aaabbb666y
@aaabbb666y
October 2023
0
2
Report
14.26. Докажите тождество:
(sinx + cosx)2
ctgx
1)
-
sin x cos x
1
=
2tg2x;
2)
(sinx + cosx)? −1
tgx
sin x cos x
ПРОВЕРЬ СЕБЯ!
-
= 2ctg²x.
=
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