Asked by rahul

a rectangle PQRS inscribed in a quadrant of circle of radius 13cm. find area of rectangle.

Answers

Answered by Reiny
Place the circle with centre at (0,0).
So rectangle has vertices at (0,0), (x,0), (x,y) and (0,y)
area = xy
but x^2 +y^2 = 13^2
y = √(169 - x^2)

area = x√(169-x^2)

If you want the MAXIMUM area, you would now differentiate that , set it equal to zero, and solve for x
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