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How to integrate cos^2(x) ? ("cos squared x")

We can't integrate cos^2(x) as it is, so we want to change it into another form. We can easily do this using trig identities . 1) Recall the double angle formula: cos(2x) = cos^2(x) - sin^2(x). 2) We also kn...
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Answered by Ella N. • Maths tutor
860992 Views

What are the different types of immunity?

Firstly, you need to understand that there are two main types: Passive Immunity and Active Immunity. We will take them one by one and break them down now. 1. Passive Immunity: As its name suggests, passive i...
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Answered by Bogdan C. • Biology tutor
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How long have you been studying physics?

I have been interested in physics my whole life, when I was 12 I made my own wind turbine out of a plastic bottle (along with a few other materials!). I took both GCSE and A level physics and just finished m...
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Answered by Nathan G. • Physics tutor
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How do you solve the #EdexcelMaths question?

Remember the uproar on Twitter about an Edexcel GCSE Maths paper, sparking the #EdexcelMaths trend on Twitter? Whether you do or don't, the question that caused the controversy is within the GCSE syllabus an...
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Answered by Curtis M. • Maths tutor
5962 Views

How to use trigonometry to find angles or lengths

Before starting any calculations it makes sense for the new practitioner to use the handy "soh-cah-toa" rule which means that you use: - sine with the opposite and hypotenuse sides to the angle. -c...
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Answered by Bradley L. • Maths tutor
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