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Use the identity for sin(A+B) to find the exact value of sin 75.

From reading the question, we need to use the addition formula for sin(A+B)= sinAcosB+cosAsinB. So we need to think what are two common values for sine and cosine that we know and have exact answers for that...
RD
Answered by Ruth D. • Maths tutor
5226 Views

Is Act Utilitarianism an effective way of making moral decisions?

The study of philosophy demands a methodical approach. When we break down a problem, we make it manageable and answering the question becomes a less daunting task. The more questions you ask, the more sophis...
AQ
Answered by Aadam Q. • Philosophy tutor
3199 Views

Find the coordinates of the centre C and the length of the diameter of a circle with the equation (x-2)^2 + (y+5)^2 = 25

Equation of a circle -> (x-a) 2 + (y-b)^2 = r 2 where the centre = (a,b) and the radius = r Thus using the equation above we can conclude that the centre is (2,-5) In order to find the diamerer fo the cir...
MC
Answered by Michael C. • Maths tutor
6267 Views

Solve 9x - 3 = 4x + 17

The objective of the question is to find an answer to x = ?, where ? is a number. Start by 'moving' all the x's to one side of the equals sign and all the numbers to the other. This can be done by adding / s...
MC
Answered by Michael C. • Maths tutor
5957 Views

How is the structure of a red blood adapted to its function?

Red blood cells are shaped like a biconcave disc - increases SA:volume ration -> increase surface for oxygen to diffuse in and out of cell Red blood cells are very small - 7um, compared with 40um average ...
NB
Answered by Norbert B. • Biology tutor
15613 Views