- Find the six trigonometric functions of 2θ, if sinθ=2/7 and π/2 < θ < π?

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Prove that for all intergers If m, n, a, b and d are integers with d>0. if m mod d = a and n mod d = b then m+n mod d=(a+b) mod d? How much time is 7:30 to 4:10? How do you make an equation that equals 37, only using numbers containing 3? What volume does 7.50 × 1020 molecules of O2 occupy at STP? What would be the normality of naoh solution if 25.00 ml the base were required to neutralize 30.00 ml of the standared acid solution?

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