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integrate xcosx

use integration by parts

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Answered by Sebastian B. • Maths tutor

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OCR M2 A level maths June 2015 question 8

i) Simplify (2 * sqrt(7))^2 ii) Find the value of ((2 * sqrt(7))^2 + 8)/(3 + sqrt(7)) in the form m + n * sqrt(7) where n and m are integers.

curve C with parametric equations x = 4 tan(t), y=53^(1/2)sin(2t). Point P lies on C with coordinates (4*3^(1/2), 15/2). Find the exact value of dy/dx at the point P.

How do you know if the second derivative of an equation is a maximum or a minimum?

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