Help I can't find the answer
Find the exact values of sin θ/2 and cos θ/2 for sin θ = 2/7 on the interval 0° ≤ θ ≤ 90° .

For angles between 0º and 90º, we know and are both positive.

Then falls between 0º and 45º, so both and are also positive.

Recall the double angle identities,

We know sine and cosine should be positive, so taking the square root of both sides gives us

Also recall the Pythagorean identity,

Then

and from here we get

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

im with everythinglos so yeahhhhh

step-by-step explanation: