The identity sin (theta/2) = +- sqrt 1-cos theta/2 is derived from which other identity?

2nd option

Step-by-step explanation:

Using

sin²A = ( take the square root of both sides )

sinA = ±

Replace 2A with θ and A with , then

sin ( ) = ±

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.