Answer:
P (n,r)= ![\frac{n!}{(n-r)!}](https://tex.z-dn.net/?f=%5Cfrac%7Bn%21%7D%7B%28n-r%29%21%7D)
Step-by-step explanation:
P (n,r)= ?
complete formula for permutation of objects in a set:
P (n,r) =
2(N - 3) = 24
Expand: 2N - 6 = 24
Solve: 2N = 24 - 6
2N = 18
N = 18 divided by 2
N = 9
Answer:
The first one
Step-by-step explanation:
The slope is 45
The y-intercept is 123.95
The total is 753.95
Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identity
sin²x + cos²x = 1 ⇒ cos²x = 1 - sin²x
Consider the left side
← multiply numerator/denominator by (1 + sinA)
=
← expand denominator using FOIL
= ![\frac{cosA(1+sinA)}{1-sin^2A}](https://tex.z-dn.net/?f=%5Cfrac%7BcosA%281%2BsinA%29%7D%7B1-sin%5E2A%7D)
=
← cancel cosA on numerator/ denominator
=
= right side , thus proven