Question

if cot a =12/5 find the value of (sin a +cos a)* cosec a​

Answer 1

Answer:

17/5

Step-by-step explanation:

cot a = 12/5 (given)

to find (sin a + cos a) cosec a

proof -  (sin + cos a) cosec a

           = sin a . cosec a + cos a . cosec a

           = 1 + cos a/sin a         (sin a. cosec a =1, cosec a = 1/sina)

           = 1 + cot a

           = 1 + 12/5

           = 17/5