Question

if cosecA -cotA = 1/2 ; π/2<A<π then cosA=??​

Answer 1

Answer:

cosecA - CotA =1/2

1/SinA - CosA/SinA = 1/2

1 - CosA/ SinA = 1/2

CosA = 1- sinA/2

Cos A = 2 - SinA/ 2