Method arg

__test__/theorem.js:1879–1881

()

  			return new BigNumber(this.a).times(this.a).plus(this.b.times(this.b)).sqrt() // sqrt(a^2 + b^2)
  		}
  		arg() {
  			return new BigNumber(this.t.atan2(this.b, this.a))
  		}
  		clone() {
  			return Object.assign( Object.create( Object.getPrototypeOf(this)), this)
  		}