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Solve for x, between 0 and 360 degrees, 4cos2 (x) + 7sin (x) – 2 = 0

Solve for x, between 0 and 360 degrees, 4cos 2 (x) + 7sin (x) – 2 = 0 The way to approach this problem is to understand the relation that: sin 2 (x) + cos 2 (x) = 1 That equation can be rearranged to give: c...
LZ
Answered by Luke Z. • Maths tutor
12379 Views

(4x + 3)/(x + 1) + 2 = 8

(4x + 3)/(x + 1) + 2 = 8 Firstly minus the 2 from both sides (4x + 3)/(x + 1) = 6 Then multiply both sides by the denominator (x + 1) 4x + 3 = 6(x + 1) Expand the brackets. 4x + 3 = 6x + 6 Rearrange the equa...
JW
Answered by Jessica W. • Maths tutor
3489 Views

Circle C has equation x^2 + y^2 - 6x + 4y = 12, what is the radius and centre of the circle

The equation of a circle is (x-a)^2 + (y-b)^2 = r^2, where (a,b) is the centre of the circle, and r is the radius. To condense our equation into this form we have to use the technique of completing the squar...
HB
Answered by Haren B. • Maths tutor
11473 Views

Outline the key features of the ontological argument

The aim of this question is to simply outline the main features of the ontological argument. This requires very little analysis. Rather, the point is to clearly and concisely explain the features of the onto...
GL
4794 Views

Why do price of exchange rates increase when interest rates increase? What does it mean that a currency is strong?

When the interest rate is high in a country it encourages investors to convert their money, e.g. into pounds, and invest their money in the country. The price change can be traced back to basic supply and de...
BL
Answered by Bence L. • Economics tutor
2492 Views