sin+sin3+sin5÷
cos+cos 3+cos 5
= tan 3
Answers
Answered by
1
Answer:
Explanation:
We have,
sin
θ
+
sin
3
θ
+
sin
5
θ
+
sin
7
θ
cos
θ
+
cos
3
θ
+
cos
5
θ
+
cos
7
θ
,
=
(
sin
7
θ
+
sin
θ
)
+
(
sin
5
θ
+
sin
3
θ
)
(
cos
7
θ
+
cos
θ
)
+
(
cos
5
θ
+
cos
3
θ
)
,
=
(
2
sin
4
θ
cos
3
θ
)
+
(
2
sin
4
θ
cos
θ
)
(
2
cos
4
θ
cos
3
θ
)
+
(
2
cos
4
θ
cos
θ
)
,
=
2
sin
4
θ
(
cos
3
θ
+
cos
θ
)
2
cos
4
θ
(
cos
3
θ
+
cos
θ
)
,
=
sin
4
θ
cos
4
θ
,
=
tan
4
θ
.
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