Discover Questions

Does boiling tap water in the kettle, get rid of chlorine? (a/b)*(a/b)(a/b)*? Tan2x=2tanx/1+tan^2x... my math teacher gave me this but I thought the double-angle identity was with a denominator 1-tan^2x? Economists will always reach the same conclusion in their positive analyses.? Is dark energy the reuslt of the Aether substance wouldn't Aether mass times C^2 equals Energy?