Choose one of the following identities to prove. 1 ) 1 sinx COST Cost 1 + sinx 2) seca + tanx COST 1 - sinx 2cosa 3) seca =1 1 seca +1 1 + cost Your answer: Choose one of the following three identities. 1) tanxsina + cost - sect 1 1 2) tanx + tana = sinccost 3) sinx -sinacos x - singx Verify the identity algebraically for r 6 Your answer. Algebraically solve the equation sin'x - cost - cos20 in the domain - San Your