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A Level

How do I integrate sin^2(x)?

First, remember the compound angle formula for cosine:

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CD
6098 Views

Why is the sky blue?

The colour of the sky comes from sunlight scattering off of the air molecules (and to your eyes). Blue light gets scattered more than red light because it has a shorter wavelength, and so the light yo...

AP
Answered by Alex P. Physics tutor
9344 Views

What was the most important factor in causing the US civil war?

Intro: The US civil war is a complex part of history known for not having one key starting point. Economics, politics, culture and the issue of slavery all contributed to the fal out between the north...

NC
Answered by Nicholas C. History tutor
4555 Views

Why does the demand curve slope downwards?

There is an inverse relationship between price and quantity demanded. When the price is low, high quantities are demanded and vice versa when the price is high; for all goods which are not giffen good...

NC
8741 Views

What is the sum of the first n terms of a geometric sequence and where does it come from?

Recall that a geometric progression is a sequence (a_n) defined ...

KN
Answered by Kamil N. Maths tutor
5312 Views

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