You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb
Answer
False
Step-by-step explanation:
Answer:
The correct answer is:

Step-by-step explanation:
By evaluating first, and then the mathematical calculation, we have:

Answer:
w>-1
Step-by-step explanation:
1 Move terms
53w-56w<16-13
2 Collect like terms then subtract
-3w< 3
3 Divide both sides by -3
Answer: w>-1
She has -80 because 4 withdrawalsof 50 is 200 subtract the that from 120 its -80