Выражения1) tg^2a/1+tg^2a * 1+ctg^2a/ctg^2a -tg^2a2) - вопрос №1212122222497932 от karenkar108 08.02.2020 13:42

Question

Алгебра: Выражения1) tg^2a/1+tg^2a * 1+ctg^2a/ctg^2a -tg^2a2) sin (a+b) + sin (a-b)/sin (a-b) - sin(a-b)3) sin11*cos15+sin15*cos11/sin18*cos12+sin12*cos18​

karenkar108 · Answer

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Выражения1) tg^2a/1+tg^2a * 1+ctg^2a/ctg^2a -tg^2a2) sin (a+b) + sin (a-b)/sin (a-b) - sin(a-b)3) sin11*cos15+sin15*cos11/sin18*cos12+sin12*cos18​

Выражения1) tg^2a/1+tg^2a * 1+ctg^2a/ctg^2a -tg^2a2) sin (a+b) + sin (a-b)/sin (a-b) - sin(a-b)3) sin11cos15+sin15cos11/sin18cos12+sin12cos18