Find all solutions to sec(x)=-sqrt(1+tan^2(x)) in the interval [0.2pi)

interval-02pi

#1

Find all solutions to sec(x)=-sqrt(1+tan^2(x)) in the interval [0.2pi)

Answer:

Sec(x)=-(1+tan^2(x))^1/2
Sec^2(x)=1+tan^2(x)
(1+tan^2(x))=1+tan^2(x)