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show that tan(x)/sec2(x) = (1/2)sin(2x)

tan(x)/sec 2 (x) Sec(x) = 1/cos(x), therefore 1/sec(x) = cos(x). also tan(x) = sin(x)/cos(x).using substitution, tan(x)/sec 2 (x) = (sin(x)/cos(x)) * cos 2 (x) = sin(x)cos(x). sin(x+y) = sin(x)cos(y) + cos(x...
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Answered by Olaitan O. • Maths tutor
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How do I write a good personal statement for entry into Medical School

Your personal statement is your way of showing the medical school that you're applying to your achievements, your thoughts and your motivation to become a doctor. Most medical schools receive a lot of applic...
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Regarding the first ionisation energies, why do the values shown on the graph go down from magnesium to aluminium and then rise again from aluminium to silicon

The first ionisation energy of an element is the energy required in order to remove the outermost electron from the element to make it an ion with the charge +1. From magnesium to aluminium the values shown ...
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Answered by Luwaiza M. • Chemistry tutor
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What is the role of the kidneys and how does it function to do its job?

The main role of the kidney is to filter the blood, to remove toxins like urea and then via various methods, parts of the kidney are able to reabsorb many of these filtered substances back for example, gluco...
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Answered by Luwaiza M. • Biology tutor
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A ladder 5.5m long is leaning against a wall. the foot of the ladder is 1.7m away from the wall. how far up the wall does the ladder reach?

This is a classic GCSE Pythagoras' Theorem question. The first thing we are going to do is draw a diagram. Once we sketch out a diagram, we can see that the ladder makes a triangle shape with the wall. If we...
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Answered by Annie N. • Maths tutor
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