Question

1/1-cosa-1/1+cosa=2cota.coseca

Answer 1

Answer:

1/1-cosa-1/1+cosa = 1+cosa-1+cosa/(1-cosa)(1+cosa)

2cosa/sin^2a

2cosa/sina. (1/sina)

2cota.coseca

Step-by-step explanation:

(1-cosa)(1+cosa) = 1-cos^2a

Sin^2a + cos^2a = 1. Sin^2a = 1-cos^2a.