Question

The cotangent of 60,45,30, are in ......... a) A. P. b) G.P. c) H.P. d) None

Answer 1

Answer:

a) A.P

Step-by-step explanation:

we know in AP that a2-a1=a3-a2

so,45-60=30-45

-15=-15

so this is AP

hope it helps you...