If sin–¹x +sin–¹y+sin–¹z=π/2, prove that x²+y²+z²+2xyz=1

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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