The angle lies in Quadrant II. sin0=3/4 What is cos 0?
1 answer:
Answer:
cosФ is ⇒ B
Step-by-step explanation:
Let us solve the question using one of the identities of trigonometry
∵ sin²Ф + cos²Ф = 1
∵ sinФ =
→ Substitute it in the rule above to find cos Ф
∴ ()² + cosФ² = 1
∴ + cosФ² = 1
→ Subtract from both sides
∴ cos²Ф =
→ Take √ for both sides
∴ cosФ = ±
∵ Angle Ф lies on the second quadrant
∴ cosФ is a negative value
∴ cosФ =
∴ cosФ is
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Step-by-step explanation:
Answer:
"f(x) = 4(1.02)7x; spreads at a rate of approximately 2% daily"
Step-by-step explanation:
<u>Complete Question:</u>
A virus that initially infected four people is spreading at a rate of 15% each week. The following function represents the weekly spread of the virus: f(x) = 4(1.15)x. Rewrite the function to show how quickly the virus spreads each day and calculate this rate as a percentage.
f(x) = 4(1.15)7x; spreads at a rate of approximately 1.5% daily
f(x) = 4(1.02)7x; spreads at a rate of approximately 2% daily
f(x) = 4(1.157)x; spreads at a rate of approximately 2.66% daily
f(x) = 4(1.02)x; spreads at a rate of approximately 0.2% daily
<u>Solution:</u>
The weekly number of people infected would be:
7 days in a week, so daily number of people infected would be:
To find daily rate, we set these 2 equations equal and solve for r:
That is 0.02*100 = 2% daily
2nd answer choice is right.