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Both the cosine and sine rule are used to find either a missing side length or angle of a triangle that doesn't have a right angle. The cosine rule is used when you know the length of two sides and the an...

sin2x = 2sinxcosxcos2x = cos²x - sin²x=2 cos²x - 1= 1 - 2sin²xtan2x = (2tanx)/(1-tan²x)

Firstly, the most important thing is to try not to worry too much about your interview; no interview is the same, and different interviewers will have very different approaches. However, there are a few t...

Writing a good conclusion is one of the hardest parts of an essay. Remember that the conclusion is the last impression you give an examiner, so it's very worth putting in extra effort and thought, even un...

The first thing when seeing such a question is to find out what the question wants you to do and plan your method to do so.In this case, the question asks you to find the normal of a curv...