Respuesta :

aniilsah555

I hope it helped U..❣️❤️❣️❤️

Ver imagen aniilsah555

Answer:

step below

Step-by-step explanation:

√(1-cos A) / (1+cos A) = √(1-cos A)*(1-cos A) / (1+cos A)*)1-c0s A)

==> √(1-cos A)² / (1-cos² A)

==> √(1-cos A)² / sin² A

==> (1-cos A) / sin A

==> 1/sin A - cos A/sin A

==> cosec A - cot A