2, 20, 4, 40, 8, 80, 16,
what’s the pattern

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

How do i do this activity, is appreciated

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.