Recent content by Angela16

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    Differentiating cos2x with Respect to x

    how to differentiate the following with respect to x x:cos2x thanks for ur help, sorry that i couldn't write it in a fraction form
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    Triangle ABC and Rectangle PQRS: Finding Area and Maximum Value

    thanks a lot, it was great help ^__^
  3. A

    Triangle ABC and Rectangle PQRS: Finding Area and Maximum Value

    rectangle located inside of the triangle, PQRS is given by A=18x-2x square i missed this part sorry ^_^ i hope that it can help for solve it
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    Triangle ABC and Rectangle PQRS: Finding Area and Maximum Value

    The figure shows a triangle ABC where AB=AC, BC=18cm and angle A is a right angle. PQRS is a rectangle with PQ=2x and QR= y cm. Find the area of PQRS and show it in terms of x. Hence find the maximum area of the rectangle PQRS. i tried to solve it by myself but i can't do it...