If sin theta = 1/2 , find the value of cos20 it's a optional mathematics Questions please solve him

cos2θ =

Step-by-step explanation:

Using the identity

cos2θ = 1 - 2sin²θ

          = 1 - 2( )²

          = 1 - 2( )

          = 1 -

          =

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

add the numbers under frequency to find the total number:

5 + 8 +7 + 4 + 0 +1 = 25

the answer is 25.