Omi67

The circle 2x^2 = -2y^2 + 12x - 4y + 20 is inscribed inside a square which has a pair of sides parallel to the x-axis. What is the area of the square?

I have a different method:

The shaded area is:

Was genau ist deine Frage?

123000000 : 494000 = 249 Tonnen

20x + 14 = 13x          | -14

        20x = 13x - 14   | -13x

          7x = - 14         | : 2

            x = - 2

A janitor found a slice of pie left in a refrigerator he was cleaning.  He measured the crust edge as 3 inches long, and the angle of the slice was 30°.  Find the following and give your exact answers:

a)       Radius and diameter of the original pie

b)      Area of the pie slice

The answer is E

1)      Solve the equations below, giving a general formula for the solutions.

a) 4sin²x-3=0

b) cos(3x)=-1

A is the answer.