Question

If 2 ( 1 + sin ) (1- sin ) = k , then find k​

Answer 1

Answer:

May be the answer of this question is 2.

The value of k is 2.

Hope it's helpful to you.

According to my point of view this is the correct answer.

Answer 2

Answer:

$2 { cos}^{2} \alpha$

Step-by-step explanation:

$2(1 + \sin \alpha )(1 - \sin \alpha ) = k \\ = > 2( {1}^{2} - \sin( \alpha ) + \sin( alpha) - {sin}^{2} \alpha ) \\ = > 2(1 - {sin}^{2} \alpha ) \\ = > 2( {cos}^{2} \alpha )$