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Find integers x and y such that 57x+79y=17, and 400 Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? Outside temperature over a day can be modelled as a sinusoidal function.? If 5sinθ = 3 determine the value of:
1. cos (θ-360)
2. Tan (squared)θ
3. Sin θ x cos θ (all divided by cos (squared θ)? 6g of Mg in 16g of O2 are burnt. Calculate mass of MgO formed.?