Prove the following identi
v 1-cos2A/sin2A=tanA

 1-cos2A/sin2A

=(1-cos^2 A+sin^2 A)/(2sinAcosA)

=(sin^2 A+sin^2A)/2sinAcosA

=2sin^2 A/2sinAcos^2 A

=sinA/cosA

=tanA

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.