If point d is placed on ac, how will the measure of dab relate to the measure of cab?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

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