Aline segment connecting two antipodal (diametrically opposite) points on a sphere will pass through the center of the sphere.
points a(2,-7,-4) and b(6,1,2) are a pair of antipodal points on a sphere. find the exact surface area and exact volume of this sphere.

Step-by-step explanation:

Diameter, Area, and Volume of a Sphere

Given the radius of a sphere (r), we can compute the area of the sphere as

The volume is

If we know the diameter of the sphere (d), the radius is half of d

Two antipodal (or diametrically opposite) points can be used to determine both the center and the radius of the spere. We are only interested in computing the radius, we need first to calculate the diameter which is the distance between the antipodal points A(2,-7,-4) and B(6,1,2). The distance between these two points in R^3 is

That is the diameter, now the radius is

Let's compute the area

Finally, the volume is

step-by-step explanation:

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).