sin square A is equals to 1 - cos 2A / 2
Answers
Answered by
4
Hey !!!
We know that
cos²A - sin²A = cos2A
°•° cos²A = ( 1 - sin²A )
•°• ( 1 - sin²A - sin²A ) = cos2A
1 - 2 sin²A = cos2A
1 - cos2A = 2 sin²A
1 - cos2A / 2 = sin²A
hence, prooved ♻
_____________________________
Hope it helps you !!!
@Rajukumar111
We know that
cos²A - sin²A = cos2A
°•° cos²A = ( 1 - sin²A )
•°• ( 1 - sin²A - sin²A ) = cos2A
1 - 2 sin²A = cos2A
1 - cos2A = 2 sin²A
1 - cos2A / 2 = sin²A
hence, prooved ♻
_____________________________
Hope it helps you !!!
@Rajukumar111
Similar questions