Ask
your own question, for FREE!
Mathematics
13 Online
OpenStudy (anonymous):
What is the exact value of cos-1(-1/sqrt2)
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
In what quadrants Cosine is -ve? 2nd and 3rd
OpenStudy (anonymous):
let x = cos-1(-1/sqrt2) cos(x) = (-1/sqrt2) now we know x is either in 2nd or in 3rd quadrants
OpenStudy (anonymous):
cos 45 = 1/sqrt2 Sry abt the 3rd Quadrant..cosine is -ve in 2nd quadrant
OpenStudy (anonymous):
so, reference angle is 45 180-45 =135 x= 135 degrees
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
xXAikoXx:
Activity: Business E-mail Write a business email for the following scenario. Pretend that you are the administrative assistant for the marketing department
xXAikoXx:
A fiction book's main ideas involve the ____. A. a character's conflict or problem B.
xXAikoXx:
What needs to be done before choosing and reading a book? A. Make sure it is nonfiction.
gelphielvr:
(chemistry 2 questions) 1. Differentiate between the plum pudding model and the nuclear model for the atom.
gelphielvr:
(logistics) If the king does not castle and the Pawn advances then either the Bishop is blocked or the Rock is pinned.
Tylerr:
Does anyone know of any reputable websites offering scholarships, or where one ca
vannieduval:
Yall need to make a section for boredom and random thoughts
Jayisbetterfrfr:
Sometimes I beat up myself, I block my own way I cloud all my thoughts, please go
Luna34:
Mending Glass A heart once whole, now cracked and worn, Its edges sharp, its fabric torn, A silent cry, a whispered ache, From love once real, now past the
xXAikoXx:
Activity: Business E-mail Write a business email for the following scenario. Pretend that you are the administrative assistant for the marketing department
1 hour ago
3 Replies
0 Medals
xXAikoXx:
A fiction book's main ideas involve the ____. A. a character's conflict or problem B.
2 hours ago
3 Replies
1 Medal
xXAikoXx:
What needs to be done before choosing and reading a book? A. Make sure it is nonfiction.
9 hours ago
2 Replies
1 Medal
gelphielvr:
(chemistry 2 questions) 1. Differentiate between the plum pudding model and the nuclear model for the atom.
12 hours ago
4 Replies
2 Medals
gelphielvr:
(logistics) If the king does not castle and the Pawn advances then either the Bishop is blocked or the Rock is pinned.
13 hours ago
17 Replies
2 Medals
Tylerr:
Does anyone know of any reputable websites offering scholarships, or where one ca
14 hours ago
9 Replies
2 Medals
vannieduval:
Yall need to make a section for boredom and random thoughts
14 hours ago
9 Replies
0 Medals
Jayisbetterfrfr:
Sometimes I beat up myself, I block my own way I cloud all my thoughts, please go
9 hours ago
5 Replies
2 Medals
Luna34:
Mending Glass A heart once whole, now cracked and worn, Its edges sharp, its fabric torn, A silent cry, a whispered ache, From love once real, now past the
7 hours ago
4 Replies
3 Medals