Question

Sin a 12/13. ctg a-?

Answer 1

Sina=12/13
cosa=5/13
cosa/sina=ctga

ctga=5/12

Answer 2

Calculation of sin(a) and ctg(a)

To calculate the value of sin(a) and ctg(a), we need to know the value of angle 'a'. Unfortunately, the given question does not provide the value of 'a'. Could you please provide the value of 'a' so that I can assist you further with the calculation?