- Algebraic expression equal to: sin( arctan[(2x+3)/(5x)] )?

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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)? Total surface of human body 1.2m^2
face temp. 30degree
surrounding 20degree
what is the heat loss from body by radiation? ? If you started with 3.60g of Copper and reacted it with an excess of nitric acid what mass of copper hydroxide would you expect to recover? What is meant by anisotropic? A reaction produced 52.1 g of kcl how much o2 was produced in grams?