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

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?