A student solved the equation sin2x/cosx=2, 0<_x<_pi, and found an answer of pi/2. Describe the student's error. (Show work and explanation please)

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Find the area of the regular hexagon if a side is 20 cm.

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show