Let's start from the left side, and manipulate it to get the right side, which would prove the identity.
We know that:
i)

ii)

.
From the above fundamental identities, we can rewrite the left hand side as:


,
which is what we needed to show.
Answer:
20736
Step-by-step explanation:
xy^4 = z
x=4 , y=3
(4*3)^4=z
12^4=z
z=20736
Answer:
x = 60 degrees
Step-by-step explanation:
we know x+(2x)=180
so, then we get 3x=180
x = 180/3
x = 60
I don't know this one am not good a this