Помогите решить алгебру срочно!

 

3arcsin ¹₂+4arccos(-¹√₂)-arcctg(-√3)       

 

 

Я не могу решить этот выражение т.к не знаю что делать со вторым модулем

4arccos(-¹√₂) нету значение в таблицы. Может поможете заранее спасибо! 23ПНКТ за Лучшее решение

Помогите заполнить пропуски в тексте.срочно до завтра надо Варианты:appeared,choral,composer,conductor,continue,first night ,full houses,influenced,masterpiece,symphony,took place,tuneless and complicated D.Shostakovich was born on 25 September .1906 in St Petersburg. His father was an engineer and his mother was a pianist and give him his first piano lessons. When he was 13 he became a pupil of the famous 1)______Alexander Glazunov at the Petrograd Conservatoire, Shostakovich was happy because he liked Glazunov’s music a lot. D.Shostakovich wrote his first 2)________in 1925 and it was performed all over the world. Every year until he died Shostakovich celebrated its 3)____________as the moment when his life changed forever . Shostakovich’s second Symphony 4)__________in 1927. It was an experimental work with a 5)_________ ending when the choir sang «To October « by Alexander bezymensky . In the years of the Great Terror (in the late 1930s) his music was criticized, the critics said it was 6)__________ .In December 1941 ,D. Shostakovich (who lived in besieged Leningrad) wrote his most famous “Leningrad Symphony”. It is a real 7)_________. Its first night 8)______________ in the besieged city in 1942. Though Shostakovich’s works were a great success and played to 9)___________ in Russia and in the West, he suffered from criticism of the official powers. Many specialists think that the conflict with the powers 10)___________ his music very much. D. Shostakovich died in 1975 in Moscow. His son Maxim, a well known 11)____________ ,helps to popularize his father’s music by working with the best world orchestras. Even now many orchestras 12)_____________ to perform Shostakovich’s music

Помогите сделать звука-буквенный разбор слова витамин

   Решить неравенства методом интервалов.

1)  (3х-4) (1-х) (2х+1) > 0

2)  (2х - 5) (7х + 3) (х + 8) < 0

3)  (5х - 6) (6х - 5) (1-х) (3х +1)  > 0

4) (10х - 1) (х + 2) (7х - 4) (7х+5)  < 0

. По проселочной дороге велосипедист едет со скоростью x км/ч, а по шоссе в 3 раза быстрее. Запишите на математическом языке:

а) скорость велосипедиста на шоссе;

б) за 3 ч езды по шоссе велосипедист проехал на 35 кмбольше, чем за 2 ч  по проселочной дороге.