The expression that is equivalent to tan(-x)cos2x is tan x − sin2x. The
correct answer between all the choices given is the fourth choice or letter D.
I am hoping that this answer has satisfied your query about this specific
question.
Answer:
69.5%
Step-by-step explanation:
A feature of the normal distribution is that this is completely determined by its mean and standard deviation, therefore, if two normal curves have the same mean and standard deviation we can be sure that they are the same normal curve. Then, the probability of getting a value of the normally distributed variable between 6 and 8 is 0.695. In practice we can say that if we get a large sample of observations of the variable, then, the percentage of all possible observations of the variable that lie between 6 and 8 is 100(0.695)% = 69.5%.
To find this answer, we will add the two numbers:
410+289=699
We make 410 positive because both sides hold space and are on opposite sides of zero so the answer is 699.
Y would equal 1/4.
1/4 + 1/2 = 1/4 + 2/4 = 3/4
You calculate the number of ways that 2 people can be chosen from 10.
The formula:
n! / r! * (n-r)! =
10! / 2! * 8! =
10 * 9 * 8! / 2 * 8! =
10 * 9 / 2 =
45 handshakes
Source:
http://www.1728.org/combinat.htm
