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Решить уравнение: В ответе указать (в градусах) наименьший положительный корень
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Предмет:
Математика -
Автор:
rosales - 6 лет назад
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Ответы 1
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Расмотрите такое решение:а) представить 2 как 2=2sin²x+2cos²x;б) sin²x-2sinxcosx+cos²x=0;(sinx-cosx)²=0;sinx-cosx=0;tgx=1 (cosx≠0);x=π/4+πn, n∈Z
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Автор:
sebastián2r22 - 6 лет назад
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0
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(An) : 10,5 ; 9,8;9,1..... Найти первое вычитаемое
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Привіт.
Допоможіть рішити тести.
102. The professor … the students’ attention to several facts.
a) paid
b) sold
c) attracted
d) rejected
103. This room is ... enough to place the furniture and the piano.
a) great
b) vast
c) big
d) small
104. The boys didn't shake their ... because they were angry with each other.
a) arms
b) hands
c) legs
d) feet
105. The doctor ... the patient and sent him to hospital.
a) examined
b) saw
c) washed
d) tested
106. Instead of going ... he went to the cinema.
a) building
b) house
c) home
d) bar
107. We have never seen such a ... man, he must be a sportsman.
a) high
b) tall
c) great
d) terrible
108. The bag was very ... , so I asked for help.
a) difficult
b) easy
c) heavy
d) light
109. Could you ... me your dictionary, please?
a) borrow
b) take
c) lend
d) spend
110. He was born in the ... of Rodnykivka.
a) country
b) village
c) pencil
d) lamp
111. Experts say that... are the lungs of our planet.
a) streets
b) gardens
c) forests
d) plants
112. Don’t interfere into my plans and mind your own ... .
a) work
b) job
c) business
d) profession
113. Can you see the ... out of this situation?
a) path
b) road
c) street
d) way
114. If you don’t feel seasick a sea ... is for you.
a) excursion
b) voyage
c) hiking
d) travelling
115. The student ... many mistakes and got a bad mark.
a) did
b) made
c) created
d) built
116. She ... at me attentively and left the room.
a) saw
b) examined
c) noticed
d) looked
117. They ... a taxi to get to the airport.
a) gave
b) took
c) brought
d) sent
118. It's ... to learn all the rules without understanding them.
a) difficult
b) heavy
c) easy
d) light
119. It's impolite to make people ... for long.
a) wait
b) expect
c) hope
d) feel
120. When I have time, I'll ... a letter to you.
a) paint
b) write
c) drop
d) read
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Предмет:
Английский язык -
Автор:
conan - 6 лет назад
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Ответов:
1 -
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