Question

sec2 θ − 4 = 0 find all solutions

Answer 1

convert sec to cos and use unit circle.

Answer 2

you will get 4 angles, in range 0 to 2pi.
then generalize.

Answer 3

so 1/cos^2=4?

Answer 4

yes, or cos x = \(\pm\) ??

Answer 5

2

Answer 6

nopes.

Answer 7

\(cos^2x=1/4 \\ cos x=\pm1/2\)

Answer 8

now find 4 angles , using unit circle.

Answer 9

pi/3,2pi/3,4pi/3,5pi/3

Answer 10

yes, now i think u can generalize it, right ?

Answer 11

pi/3+2pik?

Answer 12

and so on right?

Answer 13

\(\pm\)instead of only +
and for all 4 angles.

Answer 14

ohh ok