Question

Sendo sec ⁡x=√2 e sendo x, arco do quarto quadrante, o valor da tg x é:

Answer 1

1 +tg²x = sec²x

1 +tg²x = (√2)²

1 +tg²x = 2

tg²x = 1

tgx = √1

tgx = -1 no IV Q