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I did a question the other day which expected me to know what cos(30) is without a calculator. How do I work it out?

There are certain angles that you can use shapes and trigonometry to work out what their cosine, sine and tangent angles are. These angles are 30, 45 and 60 degrees and there are 2 very simple but important ...
PH
Answered by Philip H. • Maths tutor
13482 Views

What are the major types of social influence and what is conformity?

social influence is divided into 3 major types by its strength - conformity, compliance and obedience. conformity is the slightest one. people do as others do. it is called the chameleon effect, where people...
EK
25482 Views

With reference to 'The Lake Isle of Innisfree', explain how Yeats uses language, structure and poetic technique to convey meaning.

The Lake Isle of Innisfree is one of Yeats’ earliest poems, written while he was living in London. The author later admitted that the Isle of Innisfree was inspired by an island of the same name in County Sl...
MC
9470 Views

What is the difference between "tu" and "usted" in Spanish?

When speaking in Spanish, there are two way of saying "you" when you are talking to a single person - "tú " and "usted" . The difference between these two is that the first, &qu...
IC
Answered by Isabel C. • Spanish tutor
36075 Views

In terms of structure and bonding explain why the boiling point of bromine is different from that of magnesium

Bromine exists as a simple molecular structure- the Br 2 molecules are held together using Van der Waals forces. Whereas Magnesium is a metal and is held together using metallic bonding. Metalic bonding cons...
MA
Answered by Mubeena A. • Chemistry tutor
24436 Views