The lower right-hand corner of a long piece of paper 10 in. wide is folded over to the left-hand edge as shown. the length l of the fold depends on the angle θ. show that

l = 5/(sin(θ) cos2(θ))

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex