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Byju's Answer
For θ∈ [-4π, ...
Question
For
θ
∈
[
−
4
π
,
4
π
]
,
the trigonometric equation
cos
θ
=
−
1
2
will have
solutions.
A
8
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Solution
The correct option is
A
8
Given:
cos
x
=
−
1
2
for
x
∈
[
−
4
π
,
4
π
]
Let's draw the graphs of
y
=
cos
x
and
y
=
1
2
.
From the above graph we can see that there are
8
points of intersection in required interval.
∴
No. of solutions
=
8
Suggest Corrections
0
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