化简tan2αtan(15°-α)+tan2αtan(75°-α)+tan(15°-α)tan(75°-α)_数学解答

化简tan2αtan(15°-α)+tan2αtan(75°-α)+tan(15°-α)tan(75°-α)

人气：453 ℃　时间：2020-09-11 12:54:41

解答

tan2αtan(15°-α)+tan2αtan(75°-α)+tan(15°-α)tan(75°-α)=tan2α[tan(15°-α)+tan(75°-α)]+tan(15°-α)tan(75°-α)=tan2α{tan(15°-α+75°-α)*[1-tan(15°-α)tan(75°-α)]}+tan(15°-α)tan(75°...