Предмет: Геометрия, автор: Иринка31

Доказать, что tgA*ctgA=1

Ответы

Автор ответа: volodyk

21

tgA*ctgA = sinA/cosA x cosA/sinA =1

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: svoi12345

1. Определите видовременную форму сказуемого в каждом из них: а) 1. - What were you doing from 7 till 8 o'clock yesterday? -I was swimming in the swimming-pool. 2. We shall be skiing in the forest the whole day tomorrow. 3. I am looking for Ann. Where is she? - She is practicing her hand at table tennis somewhere here. 4. When Englishmen are neither playing nor watching games they like to talk about it. 5. He will be skating all day long. 6. Our coach was explaining a new method of kicking the ball when I came. b) 1. By the time you come we shall have already discussed the results of the game. 2. After I had heard the score of the match I congratulated myself on the victory. 3. The coaches of our team have come to the conclusion to take part in these competitions in arm-wrestling. 4. Whose teams have won in the Olympic Games this year? 5. The runner had already set a new record before his friend came to the contest. 6. The sportsmen will have done all the exercises by 5 o'clock. 2. Определите функции причастий в каждом из них 1. The man kicking the ball is a student of our Institute. 2. The exercises performed by our athletes were especially beautiful. 3. When jumping across the fence he fell down and spread his ankle. 4. Having scored 5 goals the players felt sure of their victory and weakened the tempo. 5. Being allowed to participate in the game he went to bring the rest of the players. 6 They trained much repeating the same exercise many times. 7. Hearing his name among the winners John ran upwards the stand. 8. Having arrived at the station they saw crowds of fans who had come to welcome them. 9. After visiting the gym we went to the stadium and the sports grounds.

2 года назад

Предмет: Другие предметы, автор: Михайлов11

ПОМОГИТЕ ПОЖАЛУЙСТА!!!

2 года назад

Предмет: Другие предметы, автор: dayana9977777999999

почему русская культура 19 века являются одной из высоких вершин в историй мирной культуры?

2 года назад

Предмет: География, автор: ans1451

климатические пояса в степях Европы

8 лет назад

Предмет: Химия, автор: Miiilk

Рассчитайте массу йода и медицинского спирта, необходимых для приготовления 20 г спиртовой настойки с массовой долей йода 5% . Вычислите массовые доли спирта и воды в приготовленном растворе, если массовая доля этилового спирта в медицинском спирте составляет 96%.

8 лет назад