Предмет: Алгебра, автор: xxss8jjju

3 tg² 30° + 4 tg 45° + cos 30° tg 60°
С полным решением

Ответы

Автор ответа: АнтиСпираль
9

Решить 3 tg^2( 30а )+ 4 tg (45а) + cos (30а) * tg (60а)

Ответ:

3 tg^2( 30а )+ 4 tg (45а) + cos (30а) * tg (60а)= 3 *(\frac{\sqrt{3} }{3} )^2+4*1+\frac{\sqrt{3} }{2} *\sqrt{3} = 3 * \frac{3}{9} +4+\frac{3}{2} =3 * \frac{1}{3} +4+\frac{3}{2} = 1 +4\frac{3}{2} = 6\frac{1}{2} =6,5

_________________________________________________________

ᚨᚾᛏᛁᛋᛈᛁᚱᚨᛚᛋ

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Математика, автор: r17009135
Обчисліть: 1) 376,486 + 4,114; 2) 0,9879 +359,0121; 3) 8,62 +901,28.​
2 года назад
Предмет: Немецкий язык, автор: Аноним
11. Дополните предложения.

1. Fahr mit der U-Bahn, um zu... (pünktlich kommen). 2. Frau Schneider geht in den Supermarkt, um zu... (dort Lebensmittel kaufen). 3. Wir bleiben ... noch im Büro, um ... zu ... (weiter arbeiten). 4. Ich fahre nach Köln, um ... zu ... (meine Freunde besuchen). 5. Wir wollen mit dem Flugzeug fliegen, um ... zu ... (schnell nach Paris kommen). 6. Ich gehe in die Küche, um ... zu ... (das Gemüse waschen). 7. Ich brauche noch etwas Zeit, um zu ... (diese Arbeit beenden). 8. Ich mache den Geschirrspüler an, um ... zu... (das Geschirr spülen). 9. Wir tref- fen uns mit unseren Nachbarn, um ... zu ... (zusammen ins Kino gehen). 10. Du musst dein Fach gut kennen, um ….. zu ….. (eine gute Arbeit finden). 11. Der Sän- ger fliegt nach Berlin, um ... . (dort ein Konzert geben). 12. Die Mannschaft zu... trainiert sehr viel, um ... zu ... (das Spiel gewinnen). 13. Sprich viel, um (die Sprache üben). zu...(die Sprache üben). срочно пожалуйста помогите​
2 года назад
Предмет: Английский язык, автор: arinazadolinnij
rting Up Use the prompts to make questions. Don't forget AM/IS/ARE/HAS GOT/HAVE Answer the questions. Be frank! you/ a good pupil/? your mother/afraid of snakes/? your parents / sometimes angry at you/? you / good at English/? you/ a lot of secrets/? your father / a teacher/? 137 your best friend / problems with Maths /? PE / your favourite subject/? or griod you / in love /? vodA IIA 0 you/your own computer /? 1 Are you a good pupil? Yes,​
2 года назад
Предмет: Биология, автор: sansparus
1.По каким признакам можно отличить однодольные от двух дольных? 2.Какие признаки являются главными при выделения растений в семейства?
8 лет назад
Предмет: Английский язык, автор: dimkozulin
1. This school … in the 1960s. a) was built b) built c) had built
2. When we don’t water flowers they … a) will die b) die c) are dying 3. Sam has always been interested in the stars and planets; that’s why he chose to study … a) Astronomy b) Chemistry c) History
4. There have been many reported … of Bigfoot all over the world. a) illusions b) sights c) sightings
5. We can’t log on to the Internet because there is a problem with our phone … a) server b) line c) drive
6. … creatures such as dragons and sea-monsters often appear in European folklore. a) Optical b) Mythical c) Extinct
7. Why don’t you take part in the cooking … a) contest b) parade c) march
8. Tom likes helping around the house, but he hates to … the rubbish out. a) take b) have c) do
9. We always sing Christmas carols, as it is a …. tradition in my family. a) bad b) strong c) usual
10. Take off your shoes before going into the kitchen; Mum has just …. the floor. a) mop b) clean c) paint
11. The children saw Disney floats at this colourful … parade. a) street b) town c) monthly
12. Frank … for three hours without break, so he decided to stop somewhere to rest. a) drove b) had been driving c) was driving
13. The film … at 8:00, so we have plenty of time to get to the cinema. a) starts b) is starting c) has started
14. The … we leave, the less traffic we’ll find in the street. a) early b) earlier c) earliest
15. Jack spends a lot of time on his computer …. with his online friends. a) chatting b) telling c) texting
8 лет назад