Use half angle or power reduction formulas to fill in the blanks in the identity below:

Question

(
sin
(
6
x
)
)
4
=

−
1
2
cos
(


x
)
+
1
8
cos
(


x
)

Answer 1

S
e
e

h
o
w

a
n
n
o
y
i
n
g

v
e
r
t
i
c
a
l

t
e
x
t

i
s
?