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

idk

step-by-step explanation: