Top answers

Show that 12 cos 30° -2 tan 60° can be written in the form square root k where k is an integer.

FIrst of all we need to understand how cos 30° and tan 60° are found. Let's think of an equilateral triangle, all three angles of the triangle are equal and 60° and each side has length 2. Let's half the tri...
AC
Answered by Asia-Marie C. • Maths tutor
12669 Views

"How do I write an introduction?"

Writing an introduction is very difficult to get to grips with at first but once you've mastered the basic technique, it is easily applicable to a range of essays, topics, and subjects beyond English Literat...
CW
4700 Views

Why did the English Civil War start?

The English Civil Wars started due to a combination of long and short term factors. In the short-term, the war can be seen to be triggered by an immediate breakdown in the relationship between the King, Char...
MS
Answered by Marius S. • History tutor
11860 Views

why is gravitational potential negative?

the gravitational potential is set to be 0 at a distance of infinity.
NS
Answered by Navdeep S. • Physics tutor
3609 Views

What is the equation for calculating the surface area of a cylinder?

= 2πr 2 + πd x height (= area of the 2 circle at either end + area of rectangular surface around the cylinder)
YC
Answered by Young C. • Maths tutor
4052 Views