sin2x=sinx find the value of x
Answers
Answered by
0
Answer:
x
=
n
π
or
x
=
2
n
π
±
π
3
Explanation:
As
sin
2
x
=
sin
x
, we have
2
sin
x
cos
x
=
sin
x
or
2
sin
x
cos
x
−
sin
x
=
0
sin
x
(
2
cos
x
−
1
)
=
0
i.e. either
sin
x
=
0
which implies
x
=
n
π
or
2
cos
x
−
1
=
0
i.e.
cos
x
=
1
2
=
cos
(
±
π
3
)
which implies
x
=
2
n
π
±
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