Question

simplify:(1+tan^2a)(1-sina)(1+sina)

Answer 1

Heya user ,
Here is your answer !!

( 1 + tan²A ) ( 1 - sinA ) ( 1 + sinA )
= ( 1 + tan²A ) ( 1 - sin²A )
= sec²A . cos²A
= 1/cos²A . cos²A
= 1 ..... [ ANSWER ] .

Note :

1 + tan²A = sec²A .

and ,

cos²A + sin²A = 1
=> 1 - sin²A = cos²A .

Hope it helps !!

Answer 2

This is ur answer....