Asurvey indicated that 3 out of 5 doctors use brand x aspirin. if 2000 were surveyed how many used brand x

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

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.