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Cos π/18 + cos 3π/18 + cos 5π/18 + cos 7π/18 = 3/16
how we prove it? The area of a rectangle is x^-2x-8. The width of the rectangle is (x+2). What is the length? PLEASE HELP PLEASE PLEASE
MATHEMATICS FORMULA
QUESTION IN PICTURE? ∆G°for the reaction has a value of -69.8 kJ/mol.What's ∆G at 25° reaction with 2.55atm NO, 1.65atm O2(g), .55atm of NO2? 2NO+O2⇌ 2NO2? Please help. How to find where this is increasing and decreasing at f(x)=x^2-2x? And the domain and range?