- 7+(4+3^2)-2{18-3[7-(7-5)]+1 30-{60-[8+3(5+2)]} solve please. math do today by 11:59pm?

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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)? If the earth is truly spherical, why do we not feel like we are standing upside down or sideways on the earth? i need answers please.? Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? Find integers x and y such that 57x+79y=17, and 400 ~ x + y + z = 3, x² + y² + z² = 5, x³ + y³ + z³ = 7 ➪ x⁴ + y⁴ + z⁴ = ?