Tan x= sin x/cos x. therefore, tan (90-a)°= ? (all angle measurements are in degrees)
a.) 1/tan(90-a)
b.) 1/sin a
c.) 1/cos(90-a)
d.) 1/tan a

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv