Answer:
C) 
Step-by-step explanation:
By the cos double angle formula, we know
Substituting
into the formula, we get
.
The answer is C.
Step-by-step explanation:
The total surface area is 168 square units.
Answer: 1 0 is like x you solve for x. X= 1 0=1
Answer:
take a more clear photo cant see well...
Step-by-step explanation:
but like if you re-take it ill help you....:)