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```
prove that cot(x/2)-3cot(3x/2) = ( 4sinx )/( 1+2cosx ).
prove that cot(x/2)-3cot(3x/2) = ( 4sinx )/( 1+2cosx ).

```
3 years ago

Abhishek
21 Points
```							3(cos^2/sin^2)-4/sin=1 3(cos^2/sin^2) - 4sin/sin^2 = 1 3cos^2 -4sin =sin^2 3cos^2-(1-cos^2) =4sin 4cos^2 -1 =4sin Cos^2 - sin=1/4 (1-sin^2) - sin =1/4 -Sin^2 - sin =-3/4 ...
```
3 years ago
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### Course Features

• 31 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions