Answer: welcome
Step-by-step explanation:
x
−
z
=
18
Explanation:
We can write the following averages:
x
+
y
+
80
3
and
y
+
z
+
80
3
The first (red) one is greater than the second (blue) one by 6.
Therefore the difference is 6.
x
+
y
+
80
3
−
y
+
z
+
80
3
=
6
×
3
3
×
(
x
+
y
+
80
)
3
−
3
×
(
y
+
z
+
80
)
3
=
6
×
3
x
+
y
+
80
−
(
y
+
z
+
80
)
=
18
x
+
y
+
80
−
y
−
z
−
80
=
18
x
+
y
+
80
−
y
−
z
−
80
=
18
×
×
×
×
×
×
×
x
x
−
z
=
18
Answer:
LHS of the given equation is:
sinθ+sin3θ+sin5θ+sin7θ=(sinθ+sin7θ)+(sin3θ+sin5θ)=2sin8θ2.cos6θ2+2sin8θ2.cos2θ2 [since sinC+sinD=2sinC+D2.cosC−D2=2sin4θ.cos3θ+2sin4θ.cosθ=2sin4θ.[cos3θ+cosθ] [since cosC+cosD=2cosC+D2.cosC−D2=2sin4θ.[2cos2θ.cosθ]=4cosθ.cos2θ.sin4θsinθ+sin3θ+sin5θ+sin7θ=(sinθ+sin7θ)+(sin3θ+sin5θ)=2sin8θ2.cos6θ2+2sin8θ2.cos2θ2 [since sinC+sinD=2sinC+D2.cosC-D2=2sin4θ.cos3θ+2sin4θ.cosθ=2sin4θ.[cos3θ+cosθ] [since cosC+cosD=2cosC+D2.cosC-D2=2sin4θ.[2cos2θ.cosθ]=4cosθ.cos2θ.sin4θ
any more help just ask :)
Step-by-step explanation:
1,1,2,3,5,6,7,8,8,8,9,14
bekas [8.4K]
2 because you know what you mean about the following problems