Question

(1- tan² a )/( cot² a -1 )= tan² a​

Answer 1

Step-by-step explanation:

1-tan²a = tan²a (cot²a -1)

1- tan²a = tan²a x cot²a - tan²a

1= tan²a x (1/ tan²a)

1= 1

lhs = rhs

Answer 2

Answer:

tan^2 a

Step-by-step explanation:

cot^2a-1 canbe written as (1-tan^2 a)/tan^2a

now on dividing with 1- tan^2 a we get tan^2 a