Does not exist, since the graph of cosine is continuous between the intervals [-1,1]. You do not know where it will be when it “reaches” infinity
Answer:



Step-by-step explanation:
Given

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Required
The number of decimal places
To do this, we simply calculate the number of digits after the decimal points


The product is the sum of the digits above 2 + 1 = 3
Hence:

Step 1. Simplify
7x^2 - 8x - 4 - 2x^2 + 3x + 5 + 5x^2 - 10x - 8
Step 2. Collect like terms
(7x^2 - 2x^2 + 5x^2) + (-8x + 3x - 10x) + (-4 + 5 - 8)
Step 3. Simplify
10x^2 - 15x - 7
Answer: A
Step-by-step explanation: