Question

Solve the Equation sec (theta)=2 for 0<2.

Answer 1

θ

=

2

π

3

+

2

π

n

,

4

π

3

+

2

π

n

, for any integer

n

Answer 2

`~~~\sec \theta = 2\\\\\implies (\cos \theta)^(-1) = 2\\\\\implies \cos \theta =\frac 12\\ \\\implies \theta = 2n\pi \pm \frac{\pi}3`