Method clone

__test__/theorem.js:1882–1884

()

  			return new BigNumber(this.t.atan2(this.b, this.a))
  		}
  		clone() {
  			return Object.assign( Object.create( Object.getPrototypeOf(this)), this)
  		}
  		conjugate() {
  			this.b = this.b.negated()
  			return this