Question

can we write 1-cosA /1+cosA as 1+cosA/1-cosA in proving sums​

Answer 1

Step-by-step explanation:

1-cosa/1+cosa*1-cosa/1-cosa

(1-cosa)2/1-cosa2a

1-cosa*1-cosa/1-cosa*1+cosa

1+cosa/1-cosa

where 2=square

Answer 2

Answer:

here is your answer hope it helps uh have a great 5