Discover Questions

Show that the equation cos(x) − 3x = 1 has only one real root.? If one theoretically entered a black hole, stayed there for an hour and came back out, would time have changed more than an hour in earth? Solve: 2tan(2 theta) = 1... Please explain every step and why you do them,I don't understand? State two reason why helical gears are more favourable in a vehicle transmission than straight cut spur gears? If f(x)=ln(x)+arctan(x), find the derivative of f^(-1)(2) (inverse of f(x))?