Find the value of tan20 +tan25 +tan20 *tan25 Share with your friends Share 5 Niharika Khare answered this Given : tan20+tan25+tan20 tan25= tan20+251-tan20 tan25+tan20 tan25 since: tanA+B=tanA+tanB1-tanA tanB⇒tanA+tanB=tanA+B1-tanA tanB=tan451-tan20 tan25+tan20 tan25=1×1-tan20 tan25+tan20 tan25=1-tan20 tan25+tan20 tan25=1 21 View Full Answer
