Will a pelvic exam and pap smear detect pcos and/or endometriosis?

No. Not really. The pelvic exam can rule out any masses or major abnormalities. Pcos is diagnosed based on clinical findings and abnormalities in blood work (hormonal). Endometriosis is diagnosed by laparoscopy.
No. Pocs is a diagnosis primarly based on history and laboratory findings. With regards to endometriosis, most women have normal pelvic findings, and laparoscopy is sometimes necessary for definitive diagnosis.