Предмет: Геометрия, автор: princerus

В треугольнике АВС АС=ВС=20,cosA=0,75. Найдите АВ.

Ответы

Автор ответа: kostet1998

400=x²+400-2*20*x*0,75⇒x=30
Ответ:30
---------------
Если что я использовал теорему косинусов.

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Русский язык, автор: dserbacova19

Составить текст почему нельзя загарать с корнями гор ,гар.Срочно надо пожалуйста!!!!!

1 год назад

Предмет: Английский язык, автор: anastasia3664

Ответите на вопросы! Пожалуйста срочно !!!!

Have you ever dreamed of magical _places?

What do you think about the idea of having a dog as a nanny?

Have you ever had a pet that took care of you?

What do you think is going to happen in the next episode?

1 год назад

Предмет: Другие предметы, автор: maksimchirkov

вода, переходя из одного состояния в другое,перемещаясь из океанов и морей на сушу и обратно, совершает:
А) круговорот
В) круговерть
С) разворот
D) развертку
Помогите пжлста

1 год назад

Предмет: История, автор: 23400aleks

что не входило в число положений столыпенской реформы?

7 лет назад

Предмет: Английский язык, автор: FlageR

ПОМОГИТЕ ПЕРЕВЕСТИ
PUBLIC FINANCE

Public finance is the study of the role of the government in the economy: governmental effects on (1) efficient allocation of resources, (2) distribution of income, and (3) macroeconomic stabilization.

Taxation is the central part of modern public finance. The main objective of taxation is raising revenue. A high level of taxation is necessary in a welfare state to fulfill its obligations. Taxation is used as an instrument of attaining certain social objectives. The government collects money from citizens through taxes. Income tax is the tax collected on wages and salaries. Inheritance tax is collected on what people inherit from others. Customs duties have to be paid on goods imported from other countries. VAT or value-added tax is a tax paid on most foods and services when they are bought or purchased. Companies pay corporation tax on their profits. Some forms of government expenditure are specifically intended to transfer income from some groups to others. The government sometimes pays out money to people in need, e.g. unemployment benefit (also known informally as the dole) disability allowances and student grants (to help pay for studying). Recipients draw a pension/ unemployment benefit or are on the dole or on social security.

Every country has its own special currency. Every day the rates of exchange are published and you can discover, for example, how many dollars there are currently to the pound sterling. A company may sell shares to members of the public who are then said to have invested in that company. They should be paid a regular dividend on their investment, depending on the profit or loss made by the company.

7 лет назад