How do you solve the equation equation is tan^2x + secx = 1tan2x+secx=1 for 0<x<2pi0<x<2π?

1 Answer

The solutions are pi,pi/3,(5pi)/3π,π3,5π3

Explanation:

We have that

tan^2x + secx = 1=>sec^2x-1+secx-1=0=>(secx+1)*(secx-2)=0tan2x+secx=1sec2x1+secx1=0(secx+1)(secx2)=0

Hence we have secx=-1=>x=pisecx=1x=π and secx=2=>x=pi/3 or x=(5pi)/3secx=2x=π3orx=5π3

Remember that 0<=x<=2pi0x2π