Question

(1+tan^2A)(1+sinA)(1-sinA)=?​

Answer 1

Answer:

1

Step-by-step explanation:

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

= ( 1 + tan²A ) ( 1 - sin²A )

= sec²A . cos²A

= 1/cos²A . cos²A

= 1