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Byju's Answer
Standard VI
Mathematics
Number Line
cos x=- 1√2 f...
Question
cos
x
=
−
1
√
2
find
x
∈
3
r
d
quadrant
Open in App
Solution
cos
x
=
−
1
√
2
cos
x
=
−
cos
π
/
4
c
o
s
x
=
cos
5
π
/
4
x
=
5
π
4
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