Discover Questions

Balanced chemical equation? How many formula units are in 26.23 mg
of hydrogen fluoride (HF)? How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37 degrees Celsius and 94.9 kPa? Fnd the inverse of the function and graph both the function and its inverse.? Prove the identity cos 4x + 4cos 2x = 8cos^4x - 3?
I've already proved it
But I'm having a hard time?