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Generally, we use the indicative tense when talking about facts or statements that we are confident are true and no element of doubt is expressed in the sentence.E.g. I go to the cinema = Voy al cineE.g. ...

If you have a plot of the function, you can look at its symmetries. If the plot to the left of the y axis is the mirror image with respect to the y axis of the plot to the right, it's an even function. If...

Atonement is an unusual crime writing text insofar as the perpetrator of the major crime (namely Briony who wrongly accuses Robbie of rape) is also one of the text's key victims. Briony is the na...

Recall that the Maclaurin series for f(x) is f(x) = f(0) + f'(0)x + f''(0)x²/2! + ... + f^(r)(0)x<...

This is a classic example of a trigonometry problem using the angle addition formulae. Recall that cos(A+B) = cos(A)cos(B) - sin(A)sin(B). Express R(x/2 -z) in similar form: Rcos(...