Question

URGENTE
Simplifique a expressão:

1 + (1 / sen²x . sec²x) - cosec²x

Answer 1

Resposta:

1 + (1 / sen²x . sec²x) - cosec²x

1 + (cos²x/ sen²x ) - sen²x

sen²x/sen²x + (cos²x/ sen²x ) - 1/sen²x

(sen²(x)+cos²(x) )/sen²(x) -1/sen²(x)

=1/sen²(x) -1/sen²(x)  = 0