Answer:
x = 3π/4, 5π/4
Step-by-step explanation:
cos(x+2π) = -√2/2, [0,2π]
cos(x)cos(2π)-sin(x)sin(2π) = -√2/2
cos(x) = -√2/2
x = 3π/4, 5π/4
Remember that the cosine function is periodic, so cos(θ+2π)=cos(θ).
The formula is πd!
See, π × d = π × 10 = 10 × 3.14 = 31.4!
They sold 350 bars at $1 dollar each to collect $350.
Since you make 50 cents per every dollar.
Therefore you make half of the money collected.
So, you take 350 and divide it by 2.
You would make $175 profit.
Given:
A right triangle with angles 30, 60, 90 degrees.
Hypotenuse = mm.
Base = y
To find:
The value of y.
Solution:
In a right angle triangle,
Therefore, the value of y is mm.
Answer:
We can select a lower confidence level and increase the sample size.
Step-by-step explanation:
The precision of the confidence interval depends on the margin of error ME = Zcritical * Sqrt[(p(1-p)/n]
In this Zcritical value is in the numerator. Z critical decreases as Confidence level decreases. (Zc for 99% = 2.576, Zc for 95% is 1.96, Zc for 90% = 1.645). Therefore decreasing the Confidence level decreases ME.
Also we see that sample size n is in the denominator. So the ME decreases as sample size increases.
Therefore, We can select a lower confidence level and increase the sample size.