Question

Please I need the answer very fast ​

Answer 1

1 - cosΘ

Explanation:

using the identity

sin²x + cos²x = 1 , then

sin²x = 1 - cos²x

`(sin^20)/(1+cos0)`

=
`(1-cos^20)/(1+cos0)` ← factor 1 - cos²Θ as a difference of squares

=
`((1-cos0)(1+cos0))/(1+cos0)` ← cancel 1 + cosΘ on numerator/ denominator

= 1 - cosΘ