Question

1 + tan2a 1 - sina 1+ sina = 1 proof​

Answer 1

1+tan2a-sina1+sina=1 proof= cos2A=1

Answer 2

Answer:

( 1 + tan²A ) ( 1 - sinA ) ( 1 + sinA )

= ( 1 + tan²A ) ( 1 - sin²A )

= sec²A . cos²A

= 1/cos²A . cos²A

= 1  

Hence LHS = RHS = 1

Note :  1 + tan²A = sec²A and cos²A + sin²A = 1