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

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

What is the equation of a line passing through (-6,5) and having a slope of 1/3