Arrange the following in increasing order of their basic strength:
`CH_3.NH_2,(CH_3)_3N,(CH_3)_2NH`

Explanation

To arrange the compounds CH₃NH₂ (methylamine), (CH₃)₂NH (dimethylamine), and (CH₃)₃N (trimethylamine) in increasing order of their basic strength, we need to analyze the factors that influence the basicity of these amines.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- CH₃NH₂ (methylamine)
- (CH₃)₂NH (dimethylamine)
- (CH₃)₃N (trimethylamine)
...