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Prove that sin(x)+sin(y)=2sin((x+y)/2)cos((x-y)/2)

We know that 1. sin(a+b) = sin(a)cos(b)+sin(b)cos(a) and 2. sin(a-b) = sin(a)cos(b)-sin(b)cos(a) Add equations 1. and 2. sin(a+b)+sin(a-b) = 2sin(a)cos(b)+sin(b)cos(a)-sin(b)cos(a) = 2sin(a)cos(b) Let x=a...

AV
Answered by Anna V. Maths tutor
36159 Views

What is the significance the paper lantern in 'A Streetcar Named Desire'?

Williams employs plastic theatre as a means of giving physical onstage presence to abstract concepts in order to better clarify for the audience their meaning and significance within 'A Streetcar Named De...

GE
40692 Views

The points A and B have coordinates (3, 4) and (7, 6) respectively. The straight line l passes through A and is perpendicular to AB. Find an equation for l, giving your answer in the form ax + by + c = 0, where a, b and c are integers.

For the line passing through A and B: m = (y2-y1)/(x2-x1) = (-6-4)/(7-3) = -5/2

For the perpendicular line: m = -1/(-5/2) = 2/5 

y - y1 = m*(x - x1)  >>  y - 4 = (2/5)*(x - 3)  >>...

DA
Answered by Deji A. Maths tutor
12311 Views

Evaluate the likely microeconomic impact of an increase in the UK national minimum wage.

A minimum wage is the lowest level of hourly pay that is acceptable by law. There are a number of positive impacts that could result from an increase in the UK national minimum wage. Firstly, an increase ...

DA
Answered by Deji A. Economics tutor
15930 Views

How do I do a close reading of a poem?

Relevant for both GCSE and A Level: Every student will have a different way of doing a close reading of a poem. What is important is that a student finds a style with which they are comfortable and confid...

ZZ
5157 Views

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