Question

prove that tan^2theta - 1/ tan^2 theta +1 =1-2cos^2 theta. Prove ​

Answer 1

Step-by-step explanation:

hope you will be satisfied with this answer.

Answer 2

Answer:

• tan²A-1/ tan²A+1=1-2cos²A

Step-by-step explanation:

tan²A-1/sec²A. [sec²A=tan²A+1]

tan²A/sec²A-1/sec²A

sin²A-cos²A

(1-cos²A)-cos²A

1-2cos²A

hence it prove