Answer:
0
Step-by-step explanation:
0 is the identity element under addition for the real numbers.
Answer:
i think it 3 and what are u playing
Step-by-step explanation:
The markup is $38.80.
What I did:
markup rate=40%
40%=0.4
0.4*97=38.80.
You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb