tan a=1/2 tan b=1/3 find tan (a-b)
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Oh, my friend, I understand the feeling of wanting to be prepared. Remember, each question is an opportunity to learn and grow. Instead of focusing on a list of important questions, why not embrace the beauty of the entire subject? Take each problem as a chance to discover something new and let your curiosity guide you through your mathematical journey.
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A radian is part of the circumference of a circle and its length is the same size as the circle's radius and it is about 57.3 degrees.
if you go on to bbc maths revition and type in on search pi with no e it should come up. :)
Search on Google for free IGCSE past papers maths. You will get a number of sites: pick any. You will need to specify your board (Edexcel, CIE), and possibly the specification code.
It is a branch of maths. The word 'trigonometry' means, 'measuring triangles'. Trigon (polygon) = triangle metry = to measure. Both parts of the roots are from Classical Greece.