Question

PLEASE HELP ME WITH QUESTION 4 I WILL TAG THE BEST ANSWER AS BRAINLIEST

Answer 1

Answer:

L

Explanation:

dimension of the k is L i.e the length as the cos and sin are the dimensionless quantity so

x=k[acos+bsin/a+b]

becomes x=k[a+b/a+b]

x=k

as the dimension of the x is L so k is also equals to L