Use the half-angle formulas to find the exact value of the trigonometric function sin 15°

sin 15° = 0.2588

Step-by-step explanation:

The half angle formula is:

sin 15°

The double of 15º is 30º. First quadrant, so the sine is positive.

Since

sin 15° = 0.2588

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.

21

jk it's 20

step-by-step explanation: