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Integrate Sin(2X)

-1/2 Cos(2X)
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Factorise X^2-X-20

(X+4)(X-5)
SW
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Solve the following simultaneous equations: 3x+y=11, 2x+y=8

x=3, y=2
RS
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What is the difference between a one-tailed hypothesis and a two-tailed hypothesis?

Both one-tailed and two-tailed hypothesis are examples of alternative or experimental hypothesis, which predict there will be a psychological effect. A one tailed hypothesis, also known as a directional hypo...
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Problem of Optimisation: A company is designing a logo. The logo is a circle of radius 4 inches with an inscribed rectangle. The rectangle must be as large as possible.

First, draw a diagram showing the rectangle, the circle and the unknowns . Then find the equations representing this problem (equation of a circle of center 0, x 2 +y 2 =4 2 (1) and of the area of the rectan...
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