Предмет: Алгебра, автор: Kseniya95

упростите выражени

1.tga/tga+ctga

2.cosa*ctga+sina

3.tg(квадрат)a+sin(квадрат)a-1/cos(квадрат)a

Ответы

Автор ответа: Oksano4ka
0

2. cos a* ctg a + sin a=cosa * frac{cos a}{sin a}+sin a=frac{cos^2 a+sin^2 a}{sin a}=frac{1}{sin a}

3. tg^2 a+sin^2 a-frac{1}{cos^2 a}=frac{sin^ 2a}{cos^ 2a}+sin^2 a-frac{1}{cos^2 a}=-frac{1-sin^2 a}{cos^2a}+sin^ 2 a=-cos^2 a+sin^2a=-2cos2a 

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d) ladder
e) turnover
f) example

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3.What three major advantages of recruiting apprentices are mentioned in the task-force report?
4.How much did ВТ save?
5.When do apprentices make a productive contribution to a company?
6.Why does Honda like apprentices?
7.What are the two main benefits of apprenticeships, according to Xerox?
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