Ok, you are given a point and you need to find the exact values for
First thing first. We need to see if we are working with a unit circle and find the radius.How to tell if we are working with a unit circle?We know

is a circle.
We know that to find the radius we can use the following formula:

If

we are working with a unit circle.
Lets see if it = 1.


Square both sides now
Since we squared, we have a + and a - but we disregard the - because we do not have - radii
We can also say![r = \sqrt[4]{65}](https://tex.z-dn.net/?f=r%20%3D%20%5Csqrt%5B4%5D%7B65%7D)
Ok, since
r does not equal
1, we are not working with a unit circle but we have found
r, which is our radius.
Now that we know the value of r, which is 
,
we need to look at the identities of cos, csc and tan.The identities:

Now that we know their identities and know the radius of our circle, we can find the exact values of cos, csc and tan.

The exact values for cos, csc and tan given the point (4,-7) are:

Answer:
3
Step-by-step explanation:
=
=
=
=
3
Amount after 11 years = 5000(1 + 0.11)^3 = $6838.16
so interest is 1638.16 dollars
Answer:

Step-by-step explanation:
Let's call p the probability that a passenger shows up.
Then we know that:

Then we took a sample of n = 6 passengers.
We can calculate the probability that less than 4 are presented using the binomial formula:

Where x is the number of passengers that show up, n is the number of selected passengers, p is the probability that a passenger shows up.
Then we look for:





