Measurements of sin2ϕ1/sin2β in b→c and b→s Decays at B-Factories

Measurements of time-dependent CP asymmetries related to the extraction of the CKM-matrix parameter ϕ1/β are presented. Reported analyses, based on studies of neutral B-meson decays that proceed via b→c and b→s processes, were performed by Belle and BaBar collaborations.