Respostas

2013-08-08T15:04:37-03:00
.se, senx=√2/2......x=45º >
cosx=cos45=√2/2....secx=2/√2=2√2/2=√2 >
tgx=tg45=1

A=(sec²x -1) /(tg²x +1)

A=(√2)² -1) /(1²+1)

A=(2-1) /(2)

A=1 /2 >>>>>>>>>>>>>>>
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