Acarpenter used 9 1/2 ft of cedar for every 7 2/3 ft of redwood for a construction project. if the carpenter uses 4 3/4 ft of cedar, how much redwood does he need?

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

How do i do this activity, is appreciated

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?