- Could someone help me with this Solids of Materials question? Thank you?

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Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? How many degrees of strog base and strog acid? I need news on the tremors/aftershocks/earthquake I am feeling in Maricopa county Arizona.? What town is this prefix number for 869 ? 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)?