Verify that (sinx- cos x)2 = 1 - 2 sin x cos x is an identity.
1 answer:
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Answer:
Step-by-step explanation:
For the first one, revenue - cost = profit. We have equations for revenue and profit, so filling in:
Let's add cost to both sides to make it positive and bring everything on the right over to the left and combine like terms:
For the second one:
P(x)*T(x) =
Distribute the 3x into everything inside the parenthesis to get
For the second part of that problem, C(x)*P(x) =
Distribute the x into everything first to get:
The distribute the -4 into everything to get:
Combine the like terms and put everything together to get