Discover Questions

How do you get get rid of x as an exponent. like 4=0.2^x? Cot theta is undefined, π/2 If galaxies move away from each other and get faster is it a law or theory.? YOOOOOOO I need to know what is the horizontal asymptote of this function sin(x)/e^x? If nothing moves faster than light ,so what is the motion of a gravity wave doing if it could move faster than light?