Which of the following are true? If a and b are two real numbers, then |(+ (a arctan(sin(3x) + barcsin(tan(x²))dx) = a la arctan(sin(3x) dx + b. 6 / arcsin (tan(z?))da. (^)). re co cos - dx = 0. 2 n sin - dx = x + C, where cis a 1 da does not exist. 7T 7T 2 constant. None of these is true.