Предмет: Математика, автор: r4b8cp5s9d

sin2a•(1+ctg2a)+cos2a•(1+tg2a)

Ответы

Автор ответа: fenix6810

Ответ:

2(sin2a+cos2a)

Пошаговое объяснение:

sin2a+(cos2a*sin2a)/sin2a+cos2a+sin2a*cos2a/cos2a=

=sin2a +cos2a+sin2a+cos2a=2(sin2a+cos2a)

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