If sin x is 1/3 find the value of cot2x
Answers
Answered by
0
Answer:
I found: cos(2x)=79
Step-by-step explanation:
Considering that:
cos
(
2
x
)
=
cos
2
(
x
)
−
sin
2
(
x
)
but
1
=
sin
2
(
x
)
+
cos
2
(
x
)
rearranging:
cos
2
(
x
)
=
1
−
sin
2
(
x
)
so:
cos
(
2
x
)
=
cos
2
(
x
)
−
sin
2
(
x
)
=
=
1
−
sin
2
(x
)−sin2(x)= =1−2sin2(x)
Substituting:cos(2x)=1−2sin2(x)=1−2(13)2=1−29=79
Answered by
1
Step-by-step explanation:
hope you can understand
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