Question

1 - tan square A by 1 + tan square A = 1 - sin square A​

Answer 1

Answer:

hello ,

lhs = 1-tan square a / 1+tan square a

   =   1- sin square a /cos square a / sec square a

   = cos square a - sin square a / cos square a / 1/ cos square a

   = cos square a- sin square a

   = 1-sin square a - sin sqaure a

    = 1

your answer must be 1