Ask
your own question, for FREE!
Mathematics
14 Online
Solve on the interval [0,2pi): 4 sec x + 6 = -2 A. 2pi/3,4pi/3 B. pi/6,5pi/6 C. pi/3,5pi/3 D. 7pi/6,11pi/6
Still Need Help?
Join the QuestionCove community and study together with friends!
@RaphaelFilgueiras Why?
cos(x)=-1/2
sorry i forget minus
\[4 \sec x + 6 = -2\]\[4 \sec x = -8\]\[\sec x = -2\]\[\frac{1}{\cos x} = -2\]\[\cos x = - \frac{1}{2}\]\[x = \frac{2 \pi}{3}, \frac{4 \pi}{3}\]
pi-pi/3,pi+pi/3
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Ferrari:
I Have Returned to Writing Music (by me) so if you don't know, I used to write songs on here and post them, some of them were lowkey corny though.
kaelynw:
tried a lil smt, the arm is off but i like the other stuff
Countless7Echos:
whaa this looks so silly, nothing is funnier then looking at how I draw my hands
Countless7Echos:
I don't know just no sketch doodle day :p finished a video already so I'm pretty
7 minutes ago
34 Replies
2 Medals
1 minute ago
11 Replies
2 Medals
9 hours ago
8 Replies
0 Medals
1 day ago
9 Replies
2 Medals