Hi there!

Use the chain rule:
f(g(x)) = f'(g(x)) · g'(x)
Thus:
dy/dx sin(x) = cos(x)
dy/dx cos(x) = -sin(x)
Use the chain rule format:
f(x) = sin(x)
g(x) = cos(x)
cos(cos(x)) · (-sin(x))
-sin(x)cos(cos(x))
Six * five squared
6*5^2
=6*25
=150
20.0 because it was 20.4 but round it and you get 20.0
Answer:
Step-by-step explanation:
id like to help but i cant see the attachment :(
The answer is 7x/12 - 1/2. Its the first option in your picture. Hope this helps .