Question

math help

Answer 1

Hint :
\[\large a^2 - b^2 = (a+b)(a-b)\]

Answer 2

Also notice that \[\large 1 = 1^2\]

Answer 3

the numerator becomes
\[\large \tan^2\alpha -1 = (\tan\alpha)^2 - 1^2\]

Answer 4

see if you can factor it using the first hint

Answer 5

c?

Answer 6

thats right! how did u get c ?

Answer 7

[tana-1] [tana+1] / [1+tana]
which eqauls to C right?