Use the trigonometric subtraction formula for sine to verify this identity:

cos((π / 2) – x) = sin x

answer format:

calculation:

1.

2.

reason:

1. -this follows from the difference formula for cosine

2. -this follows by evaluating at π / 2

this proves the identity:

-

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

you have to find the same variables -3n - 5n so this would be -3n +(-5n) which equals -9n

66% of the price that was mark on the bottom