Question

show that 1-tan²A/cot²A-1= tan² A​

Answer 1

Step-by-step explanation:

1-tan²A/cot²A-1

(1-sin^2A/cos^2A)/(cos^2/sin^2-1)

(cos^2A-sin^2A)/cos^2A / (cos^2A-sin^2A)/sin^2A

1/cos^2A/1/sin^2A

sin^2A/cos^2A

tan^2A