Answer:
1 - cosΘ
Step-by-step explanation:
using the identity
sin²x + cos²x = 1 , then
sin²x = 1 - cos²x

=
← factor 1 - cos²Θ as a difference of squares
=
← cancel 1 + cosΘ on numerator/ denominator
= 1 - cosΘ
And its 6 600 and 202 and add 100 which means it will be 12 THATS your answer
The triangles are shown to be similar, therefore

The answer is 9 units