Answer:
i
Step-by-step explanation:
You can use the sum and difference identities which for cosine is cos(a+b)= cosacosb-sinasinb
Answer:
a = -7 and b = 1. The constant term is 4
Step-by-step explanation:
In standard form, this equation is -7x^2 + x + 4 = 0
The coefficients are a = -7 and b = 1. The constant term is 4.
Answer:
7 2/3
Step-by-step explanation: