Respuestas

2012-08-06T01:07:49+02:00

(tgx+2)(2tgx+2)
(tgx+2)(2)(tgx+1)
2(tgx+2)(tgx+1)
2( (tgx)^2+3tgx+2 ) ..... pero (tgx)^2+1=(secx)^2
2( [(tgx)^2+1]+3tgx+1 )
2( (secx)^2 +3tgx+1 )
2(secx)^2 +6tgx+2