Recall or look in a dictionary to find the meaning of the Prefix co-. What does this prefix mean? How can it help you remember the meaning of collinear.

What basic trigonometric identity would you use to verify that sin x cos x tan x =1-cos^(2)x?

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin