Answer:
sin(3π/7 - 2π/21)
Step-by-step explanation:
Given
sin 3π /7 cos 2π/ 21 − cos 3π/ 7 sin 2π/ 21
Required
Write a trigonometry formula for the expression
Using sine formula, we have:
sin(A - B) = sinAcosB - cosAsinB
The above formula can be applied to the given expression where
A = 3π/7
B = 2π/21
So, the trigonometry formula is:
sin 3π /7 cos 2π/ 21 − cos 3π/ 7 sin 2π/ 21= sin(3π/7 - 2π/21)
Brainliest please I’m trying to rank up
Answer:
Normally distributed => get ready the normal probability table, or equivalent.
mu = mean = 28 oz
sigma = standard deviation = 2 oz
Need to find P(30 to 31), the probability of filling between 30 and 31 oz.
Solution:
With normal probabilities,
P(30 to 31) = P(X<31) - P(X<30), i.e. the difference of the right tails for X=30 and X=31.
Calculate the Z scores
Z(X) = (X-mu)/sigma
Z(31) = (31-28)/2 = 1.5
P(X<31) = P(Z<1.5) = 0.9331928
Z(30) = (30-28)/2 = 1.0
P(X<30) = P(Z<1.0) = 0.8413447
Therefore,
probability of filling between 30 and 31 oz
= P(X<31) - P(X<30)
= 0.9331928 - 0.8413447
= 0.09184805
= 0.0918 (to 4 decimal places)
Step-by-step explanation:
45% of 45....is 20.25
this any help?
Answer:
The answer to the question provided is 30.
Step-by-step explanation:
[I apologize if the answer to the question is inaccurate]