Answer:
Step-by-step explanation:
We apply the formula .
Note that . Take and in the formula above to get
Then the value of this expression is
We can use the cosine addition formula again to simplify further. Decompose the fraction in the argument as:
Applying the formula with and we obtain
We conclude that this expression has the value
Answer:
5/10 + 3/10 = 8/10
5/10 - 3/10 = 2/10
Step-by-step explanation:
1/2 = 5/10
5/10 + 3/10 = 8/10
5/10 - 3/10 = 2/10
I dont know the answer im just here for points
Answer:
Im sorry i dont know what im supposed to be answering
step-by-step explanation: