самолет летит горизонтально и прямолинейно со скоростью 400 км/ч .Наблюдатель,над которым чсамолет пролетел,установил что самолет в некотрый момент времени был виден под углом 65 градусов цельсия к плоскости горизонта,а через 30 с-под углом 39 градусов к этой плоскости.на какой высоте летел самолет??

Нужно поверить тест

1. Укажите предложения, глаголы-сказуемые в которых стоят в Present Indefinite Passive.
He is reading a book.
I am a student.
I was asked at the lesson.
+The books are given to the students every lesson.
The house was built last year.
+The text is translated by the student.

2. Укажите предложения, глаголы-сказуемые в которых стоят в Past Indefinite Passive.
Many books for children will be published next year.
+Many new houses were built in Moscow.
She was reading a book.
+The book was on the table in the morning.
Was the work done in time?

3. Укажите предложения, глаголы-сказуемые в которых стоят в Future Indefinite Passive.
+I shall be offered an interesting work.
Many schools are built in our country.
+Our laboratory will be provided with all necessary equipment.
Rome was not built in a day.
These devices were made in the USA.

4. Укажите предложение, содержащее правильный перевод предложения "Меня спрашивают преподаватели на уроке".
I am asked by the teachers at the lesson.
I ask the teacher at the lesson.
+I asked the teachers at the lesson.
I shall ask the teachers at the lesson.

5. Укажите глагол, который следует вставить. The work ______ done yesterday.
am
are
is
shall be
+was
were
will be

6. The work ______ done tomorrow.
am
are
is
shall be
was
were
+will be

7. The work ______ done every day.
am
are
+is
shall be
was
were
will be

8. Укажите возможные краткие ответы на вопрос: "Was the work done by the students yesterday?".
No, it isn't
+No, it wasn't
Yes, it is
+Yes, it was

9. Укажите предложения, глаголы-сказуемые в которых стоят в Passive Voice.
+He will be sent to the South in April.
I was told an interesting story.
It rained yesterday.
+Many books for children will be published in our country in the nearest future.
She dances well.
The letter is interesting.
+The newspapers were looked through yesterday morning.
+The pupil will ask me about his test tomorrow.
+The pupil will be asked at the next lesson.
The weather is cold today.
+This book was written by L. Tolstoy.

Решите уравнениe^

1) sinx=sinx*cosx

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