Am looking for some reference of written tutorials or videos around trigonometry that can help my daughter build a strong foundation and systematically learn high order problems. I am only able to find such videos in bits and pieces on ...
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Please explain it with pictorial representation.
I have been wondering, Why decimal shift towards right on multiplication? Can anyone tell me the concept behind it?
Can anyone explain Why is (a + b)square = (a)square + (b)square +2ab? Is there a reason?