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Сова5
@Сова5
July 2022
1
5
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Упростить:
cos a + ctg a / ctg a - sin a - 1
sin^2 a + cos (п/3 - а) * cos (п/3+а)
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drakerton
sin²a + cos(
+a)*cos(
-a) = sin²a + 1/2 * (cos(
+a+
-a) + cos(
+a-
+a)) = sin²a + 1/2 * (cos
+ cos2a) =
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Сова5
Какой конечный ответ будет ?
Сова5
А то Я не понимаю
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Answers & Comments
sin²a + cos(